Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f7156f49bb303e…

MALICIOUS

PDF

45.9 KB Created: 2020-08-20 19:44:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae824a889f19d4046c16b235793c0b1b SHA-1: f3d7e3c9f541c53035b6b13db99016d542f8a92a SHA-256: 91f7156f49bb303e06c339fae504ca212f9f1e6bdb8bf3545fd50dc267fbac11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify-hosted PDFs, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the text 'Calibrate gps on android' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=calibrate+gps+on+android
    • http://files.ammoudiclub.com/uploads/1/3/1/3/131381055/xupibeferag-jizabede-zovewup.pdf
    • http://lupepalik.thehistoriansquarterly.com/uploads/1/3/0/7/130776208/povinex-xikopof-vikegomugogatij.pdf
    • http://files.peter-m-acland-foundation.org/uploads/1/3/1/3/131380032/0118b3d.pdf
    • http://rowana.everlastinglovechurch.org/uploads/1/3/0/8/130874493/jivaliwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/konufolamof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/thrombocytes_thrombus_formation.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/leadership_bs_pfeffer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/wexaxamoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/goben.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/gallstone_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/pathologic_basis_of_veterinary_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/characteristics_of_a_good_research_study.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/kuxofumurofirudonuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/buck_boost_converter_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9512/1319/files/jixevujifisatawadiwed.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/animal_farm_novel_in_urdu_free_download.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a29.bin
c3b5117936c2654205bfeafab724c090a9ac3332c75fac70b46067ea3b26001c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 5080 bytes
font_01_sfnt_off00007b71.bin
ae0cdcdcdfd040d474d09fc94bf1bff19866eca732f47f13d419dffca1e11b99
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B71 9804 bytes
font_02_sfnt_off00009d07.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D07 4324 bytes