Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c97afcf1d08aff…

MALICIOUS

PDF

33.3 KB Created: 2020-08-03 12:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96379fe1ce84ffcd212e59c28f91993c SHA-1: 602ad697f91ae411716a1f1bbc6c98f41a42fe74 SHA-256: 31c97afcf1d08aff1df1e6a59dbe6a3868e9d95792b338d952fc79998aab637f
160 Risk Score

Malware Insights

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

The PDF contains a prominent link that claims to offer a free download, but it redirects to a known malicious infrastructure. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO manipulation. The document body, though partially corrupted, contains text related to a download lure and the malicious URL.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=speak+your+mind+pdf+free+download
    • http://files.amorhealingkitchen.org/uploads/1/3/1/6/131606465/a1dda7.pdf
    • http://files.crystalfallstradingco.com/uploads/1/3/2/8/132814073/zalelofevukijujadu.pdf
    • http://files.e-c-m.ca/uploads/1/3/1/3/131383673/b7f37.pdf
    • http://files.amarisspa.com/uploads/1/3/2/6/132695805/desogawusigo_gamixubusinag_doxefezebobowen_mipuvemukoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/wafidolisiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/55192562777.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/44512900707.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/dayton_ohio_zip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/8438264581.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/degejuwetisagemudow.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/vigisefatomalivuruguverem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/niwifomododonoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/no_man_s_sky_distress_beacon.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/61855142582.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/wexunilekoba.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/fundamentals_of_database_systems_5th_edition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004543.bin
553bfd1f0c2ee7f5bb4c4eb4d459efa5fd45181cf5d11c7d063907868b4642dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4543 5372 bytes
font_01_sfnt_off00005793.bin
af3167d4748e8c286ee4606b39459fe15d0d78a30e0a2854f9bb1ca187db19c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5793 9548 bytes