Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60a4be7d36416c2…

MALICIOUS

PDF

37.4 KB Created: 2020-07-09 11:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: 5b616114b2798ddfd0baa0f9d198a7bf SHA-1: f8a50d4b578761a59c8d5c649d76973cfd56814f SHA-256: d60a4be7d36416c259afa3015cd8623206a66d182be53c02dfcbf25cb87fd37d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to an "Ethiopian grade 11 biology textbook pdf" and embeds a large number of external links. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one URL points to known malicious redirector infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm, likely for SEO manipulation or to distribute malicious content. The embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.com/pify?keyword=ethiopian+grade+11+biology+textbook+pdf In PDF document text
    • http://files.beautifulbelliesdoulacare.ca/uploads/1/3/0/9/130969552/5976650.pdfIn PDF document text
    • http://files.subwaystash.com/uploads/1/3/0/9/130969809/zurolawukeka-zutajopuba-dikonafipimas-wudobatefef.pdfIn PDF document text
    • http://files.jessieanimation.com/uploads/1/3/2/6/132682565/731bda74c3cfb7a.pdfIn PDF document text
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.pdfIn PDF document text
    • http://files.bensawyermusic.co.uk/uploads/1/3/2/7/132740218/kelupotamevivok.pdfIn PDF document text
    • http://files.diggersite.com/uploads/1/3/0/9/130969154/xovazukemepobudiro.pdfIn PDF document text
    • http://files.1stkentuckyrifles.westhistory.net/uploads/1/3/1/3/131379552/4619598.pdfIn PDF document text
    • http://files.timetraitor.com/uploads/1/3/0/7/130774990/zanomolib-nibev.pdfIn PDF document text
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdfIn PDF document text
    • http://files.gandstlpc.net/uploads/1/3/1/3/131379049/bevakefigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://letevotiva.files.wordpress.com/2020/07/41280841383.pdfIn PDF document text
    • https://duwarezozaju.files.wordpress.com/2020/06/90517956495.pdfIn PDF document text
    • https://misawizotepu.files.wordpress.com/2020/06/70600243259.pdfIn PDF document text
    • https://gulexukegabi.files.wordpress.com/2020/06/wewelotabuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38655606666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C1 5296 bytes
SHA-256: afb67123ac13182bde1e7fc9e982dcc6a103d59460767750a120ff2a5b74d1e0
font_01_sfnt_off000069c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C3 8944 bytes
SHA-256: 3b3362f0ffa81aeeb6263a6603d3ee7c47ff94a034806c03d3898987ef8f6b20

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