Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0963ea4d7841652…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 21:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7853461d1fce3e03a35a644d0b5e1ebe SHA-1: 76b7a8f32398623125d1f63c92c4af91a4b43890 SHA-256: a0963ea4d78416529662274695caa650bb30bc509b081f3dd15570159277f28c
128 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it is an email cover letter template, which is a common social engineering tactic. It includes a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are hosted on Shopify. The presence of a visual download button further supports the lure.

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=email+cover+letter+format+template
    • http://files.publishershaven.com/uploads/1/3/1/4/131406744/1ab589685fe7b92.pdf
    • http://xopozepu.samueldongus.com/uploads/1/3/0/8/130814423/mukomilasume.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/90890874768.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/xitsonga_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/43575059212.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/borizojerako.pdf
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/allahabad_high_court_order.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8887/files/96822410594.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/megeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/complete_subject_verb_agreement_rules_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/batla_house_full_movie_khatrimaza.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/ensayo_de_la_pelicula_escritores_de_la_libertad.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/nujovu.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_off00006d6c.bin
068611550e5ed1145f7050e007f7cd0bc6a5c921c0d56fe8da16af19449c0580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 5000 bytes
font_01_sfnt_off00007e60.bin
b11a926fec0aa0b464cd703a722ff4c9a92d38f06f5031219da53b87f15e13e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 10860 bytes

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