Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5541f37d86db0f…

MALICIOUS

PDF

48.2 KB Created: 2020-08-14 00:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccc72c7624150abb72c6f1b30f706a1e SHA-1: dad8214026198c09702367484b82b565a9df1a59 SHA-256: 3e5541f37d86db0f4a01cf6d077ccc9476ffedef1ff14de83d5c04171004e9ac
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign documents. However, one critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented as a download for business templates. This suggests a social engineering lure to redirect users to malicious content. The presence of a visual download button heuristic further supports this phishing pretext.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+business+poster+design+templates
    • http://mugorumom.alyssacouturier.com/uploads/1/3/1/3/131378776/5262119.pdf
    • http://files.freedstournament.com/uploads/1/3/0/7/130739404/2375873.pdf
    • http://files.844trijunk.com/uploads/1/3/0/7/130740256/nofukal.pdf
    • https://cdn.shopify.com/s/files/1/0443/2855/0556/files/mckinsey_approach_to_problem_solving.pdf
    • https://cdn.shopify.com/s/files/1/0447/8559/8615/files/88516880103.pdf
    • https://cdn.shopify.com/s/files/1/0450/0946/9604/files/english_conversation_lesson_plans_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/99770111962.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0824/files/89970668868.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/jolene_2008_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0451/4581/7253/files/materiales_dentales_conocimientos_basicos_aplicados_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/51391317060.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/49556634374.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5129/files/womebi.pdf
    • https://cdn.shopify.com/s/files/1/0450/2369/0916/files/human_anatomy_and_physiology_marieb_and_hoehn.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bumagigefabap.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_off000074af.bin
e5d529c73b941d6093697c8673f076d1e06e960a0732bd7c9134608f022fe623
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AF 5372 bytes
font_01_sfnt_off000086c5.bin
2b17894289ef4ac549ca5ccbfe538e6ebde94701791c0542cba9a71f2d67f349
pdf-font-stream PDF embedded font (sfnt) at offset 0x86C5 2268 bytes
font_02_sfnt_off000090d8.bin
421474cb5d0884720f73ddaebdd5954ca7a236264ce15448476d717d52c0fe49
pdf-font-stream PDF embedded font (sfnt) at offset 0x90D8 10180 bytes