Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b9c1717fc3559f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-06 04:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0b4060ba0948607fa2c48c6437609e6 SHA-1: 06f41310d18ddfe7ba45509512bc988716c19dc8 SHA-256: 60b9c1717fc3559ffbb8c659fee328ec9fcfcde24d577dd745e20edbed6d6c4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host SEO-optimized PDF files. One prominent link, disguised as a psychology book download, redirects to a known malicious domain. This suggests a phishing or scam attempt leveraging SEO techniques to distribute malicious content.

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.ru/pify?keyword=best+psychology+books+on+human+behavior+pdf+in+urdu
    • http://files.blairstownpubliclibrary.com/uploads/1/3/1/8/131858661/lesusupodowite.pdf
    • http://files.tacdistancerunners.com/uploads/1/3/1/4/131438217/beniwid.pdf
    • http://files.suisunvalleyfillingstation.com/uploads/1/3/2/7/132712282/rogujidos-gufuxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/96528443982.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/66564643323.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/champion_pressure_washer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/40223489445.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/pukixinavuvoposetavor.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/nopexez.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/79859055985.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/acritud_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/opencv_install_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/pimevoled.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/pewekizedidugadinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/energias_renovables_en_peru.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006844.bin
f7c951140b0d0bc290d70e106e08dd06d02ab9036c8f4385cd91ec6abd40a3a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 5984 bytes
font_01_sfnt_off00007c86.bin
6991772c3eeed05e3071c22ad26d351d9eecbed99e03ec9927c0c5f642ac5f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C86 10036 bytes