Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b85134273ce695…

MALICIOUS

PDF

48.3 KB Created: 2020-10-24 06:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 27b49932baddce22d44b1eab27be025d SHA-1: 9e2f226c1e66284a590532b98b2792ef2346a5c1 SHA-256: a7b85134273ce69577a0748d7e787334add384885d6ea1f8a06b9866a17d64c0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm designed to appear as legitimate resources. One prominent link, 'https://ttraff.link/pify?keyword=computer+architecture+books+pdf', is identified as a malicious redirector. The PDF's structure and the presence of many links suggest an attempt to drive traffic to malicious infrastructure, likely as part of a phishing or scam campaign.

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://ttraff.link/pify?keyword=computer+architecture+books+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/i_love_unir.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/finance_clerk_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/38794446611.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/podojenadibijaduwemu.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sokokupesasum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0259/7023/files/walmart_canada_car_battery_charger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9366/8255/files/wozelodejasogiteda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b65958c-24ad-4424-bcd7-b8641ac6e9b1/zamejivagafamiwegigowixij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff0ce74e-12f2-4d56-a43e-d2fd6a5087c1/88824214328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0ee33d-7601-4f51-84f1-d92bd2d01ecb/madutotewigufutadulomimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7988735c-18c5-4e75-bb15-18dee25b982d/kilolem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932bc4dc-3883-4770-b164-9472d9e1d542/fovavunaxirapiwanujadib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3146/8453/files/kajamuvem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8696/files/neutrino_plus_app_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9920/4000/files/button_hunt_3_walkthrough_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0200/3108/files/convolution_integral_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1634/6007/files/filofuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324da928-f2e7-4e0a-8de7-2b471bf743f7/pigadirojevusenuxoxapoken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67c44fc-48f7-42b8-9de8-1125c1d59e91/9875230635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0953/9747/files/26736313949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/10071584571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1622/3401/files/rujofufajano.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_off00007bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF9 5472 bytes
SHA-256: b4a4d66911790ad36c364543d99120876f6a33ee972b0f09adbc1a93385179ff
font_01_sfnt_off00008e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5E 10972 bytes
SHA-256: 524b0c39d2a4745da52dfcda8e6da5e9db82bec712311a5dedc8161c55f33486

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