Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbb946637190271…

MALICIOUS

PDF

39.1 KB Created: 2020-08-25 03:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65c4efa90d152b799e1b4a98939f1fae SHA-1: d591560451bba09c55d8c7dfbe246d3d9b42aa83 SHA-256: 2dbb946637190271ec4d4b6a2b6fe7cee38fbb6dcfd354b20e8cc6ac12725669
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning tactic to lure victims. The document body, though heavily obfuscated, contains the string 'Finding interquartile range worksheet' and the malicious URL, indicating a lure to disguise the malicious intent.

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.com/pify?keyword=finding+interquartile+range+worksheet
    • http://files.steveweave.com/uploads/1/3/0/8/130814112/mikukefekorawof-ruzatatu-tikulolebud.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/2518013421.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/vewanukizatugibizeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/handcuffing_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/xepini.pdf
    • https://cdn.shopify.com/s/files/1/0450/3673/2566/files/xamuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/date_format_using_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/epidural_analgesia_in_labour.pdf
    • https://cdn.shopify.com/s/files/1/0428/5503/9135/files/google_authenticator_en_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/calisthenics_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/arkitektura_e_kompjuterit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7845/1349/files/sign_guidelines_stable_angina.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2921/files/pixusofex.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_off00005b40.bin
c148b6bedf993a10d8dcaf5c0d1e87a9f0b6cf8fbbf1e86526c7f2b06857c1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B40 5324 bytes
font_01_sfnt_off00006d5b.bin
b6a35d313dcadf29b6492a490e4ccb2c00dff46edf4e46584af382c43a26d684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5B 9980 bytes

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