Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c7e5ac39180135…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 22:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c5ea09201030f2e9352e1d91fe46919 SHA-1: cd5142fa43373ea62ae215ca36ab4deb030bd8d2 SHA-256: a4c7e5ac3918013509751f21c0f378c3f79979a150b98b094b85b4540433b686
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=abrsm+piano+grade+1+pdf'. This URL is presented within the document body, disguised as a link to an 'Abrsm piano grade 1 pdf'. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute the malicious content. The primary intent appears to be redirecting users to malicious infrastructure.

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=abrsm+piano+grade+1+pdf
    • http://files.alignwellnessatl.com/uploads/1/3/0/8/130813821/gexitolirojijefodo.pdf
    • http://files.warriors4god.com/uploads/1/3/1/4/131409574/3091075.pdf
    • http://files.fabulousfacecreations.com/uploads/1/3/1/8/131856065/3c286952c5ba.pdf
    • http://files.fcccamp.org/uploads/1/3/1/8/131857315/694c181.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bapumonotirugapagemuzigin.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/4780489263.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/regizidizijedasizupinafof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/napagevedekobepowawi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7787/files/nada_boat_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/9804/4568/files/gasigedokejir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/jabawasixodemur.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/kiss_me_quick_nathan_sykes.pdf
    • https://cdn.shopify.com/s/files/1/0439/2232/5672/files/fundamentals_of_computer_graphics_4th_edition_github.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/sebojekojowagikolud.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2687/files/85929210216.pdf
    • https://cdn.shopify.com/s/files/1/0440/4854/8005/files/lateral_thinking_puzzlers_paul_sloane.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/96570103731.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/fesezixojifep.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/
    • https://cdn.shopify.com/s/files/1/0432/9334/3902

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6e.bin
735498c8252b8092070203f3d1248390ff600206c1b9eaf89d76df879d11eec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 5512 bytes
font_01_sfnt_off00007d0a.bin
f4f9c918d1645135508282f331bafe39006224f138dddec848dddbf591013949
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0A 11112 bytes