Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7121bb91ec776f…

MALICIOUS

PDF

40.6 KB Created: 2020-10-03 06:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b23111114f21b2677a5cee41f4ea1bb6 SHA-1: 63db34cf658d1d80954f27529b3f41c52be85158 SHA-256: ba7121bb91ec776f4a3f6f97b4898b2ee08e1e8a729d0b359708d39ebda201ed
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a title, likely intended to trick users into clicking the malicious link. The presence of a malicious redirector and a large number of external links suggests a campaign to drive traffic to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=as+vantagens+de+ser+invisivel+legendado In PDF document text
    • http://files.smithlineindustries.com/uploads/1/3/0/7/130776201/kelilesugumi-daketalugebi.pdfIn PDF document text
    • http://files.prayerballoons.org/uploads/1/3/2/6/132680813/4922688.pdfIn PDF document text
    • http://files.fogvapery.com/uploads/1/3/2/6/132696483/rukenel-zataxupog-rigebe.pdfIn PDF document text
    • http://files.artistry.dance/uploads/1/3/2/8/132815882/movir_jujivag_lamifax.pdfIn PDF document text
    • http://files.lodgeprestwick1060.com/uploads/1/3/1/4/131453111/kosogopeti-vamixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4852/0865/files/crime_patrol_18th_november_2015_paris_attacks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/removable_ladder_rack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1672/4386/files/7136249493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9354/4091/files/50863733842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/49346370354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0c428d-60e1-48b2-b35b-29152075ef2b/wirijabufesapesufugimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22389ec2-e374-4732-99f6-41281e66f3df/fajagadowijigesuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f69cc6e-b701-47ef-bcb1-04a43a88bf3f/rudibufosaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8383233-c8f3-46d6-b29f-da5430c3795d/xosijepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7cfd191-6ccd-4442-9284-3a875e1492c4/gewegafesasijevevujorela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d226b9c-c8b8-4c80-bb66-a13f5923f88d/gagano.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 5040 bytes
SHA-256: 83fc575ba9a611f37e63e314b7bd3e1b7774e7c1a17740e02f123343ea163b5f
font_01_sfnt_off00006f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4B 11984 bytes
SHA-256: c6bb0318fa8c2f13e2dfaa7720d79837fe1b552f6a6a157751ffd66d38b0f9f2

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