Malicious PDF — malware analysis report

Static analysis result for SHA-256 9810ba6db2e0fdab…

MALICIOUS

PDF

45.8 KB Created: 2020-10-10 17:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e2eb37c609d12dd0bb64cbcab32837fb SHA-1: aa98344bcb3677427c82ba10a38bdf4c081a524a SHA-256: 9810ba6db2e0fdabe2cc5746f389ca84f578103b24458112c968f210b982c505
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://gettraff.ru/pify?keyword=munchkin+game+2+player. Additional heuristics indicate a link farm on disposable hosting, with many URLs pointing to PDFs on domains like greaterdallasdistrictamechurch.com and various other subdomains. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/pify?keyword=munchkin+game+2+player In PDF document text
    • http://bizosaw.inmyknickers.com/uploads/1/3/1/4/131454270/gozepidokes.pdfIn PDF document text
    • http://rubija.xalimadsgn.com/uploads/1/3/1/0/131071021/4212004.pdfIn PDF document text
    • http://polufuxu.greaterdallasdistrictamechurch.com/uploads/1/3/2/6/132696111/4567441.pdfIn PDF document text
    • http://files.jazzvoicelab.com/uploads/1/3/1/4/131437350/5734518.pdfIn PDF document text
    • http://pesozam.imaginationlab4kids.com/uploads/1/3/1/4/131483109/f3d57e344.pdfIn PDF document text
    • http://mujut.abodobusinesssolutions.com/uploads/1/3/1/0/131070381/bumanawot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3229/files/go_launcher_ex_prime_vip_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/you_file_a_float_plan_for_a_weekend_trip._which_of_these_should_be_included_in_the_plan_quizlet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/big_chief_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2130/4486/files/97070286142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d2a114-3cce-46d1-bb38-2d4c7189b848/pizorafipejupoximipajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d872b855-741f-420c-9ffe-90d5276b7ed6/16589439569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b977ee-5ac0-44ae-ad7d-bd58e6eae98b/64945135219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f196d0f1-5d41-40ae-b6bc-1639942be2d1/46452496233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2e5aa6-0f5d-481f-8329-01ace64731ad/15102000641.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000667e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 5164 bytes
SHA-256: 357d8189dca2ca29a72c455a52d667a217a7bc4e64970e13287edbab051907d3
font_01_sfnt_off000077df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10588 bytes
SHA-256: 38adc9719e372b1995370f7041a7f4d4b29e9e59c5345735a5cef1717af5b4ea
font_02_sfnt_off00009bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c