Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd59ad86709c7e2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 20:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd3fc3f4f5d3be361b616601e3526838 SHA-1: 7f5cbdbc26a20c723c105c5758fff1607b0618d3 SHA-256: 2bd59ad86709c7e277e39c26c2df6d9d4c851ce676268ce687329f035edaae55
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, specifically `https://ttraff.link/wix?keyword=clash+of+clans+gem+glitch+android`, which is presented as a lure for 'clash of clans gem glitch android'. This indicates a phishing or scam attempt to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=clash+of+clans+gem+glitch+android
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/bericht_schreiben_6._klasse_bung.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/ralavazikoso.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/fax_cover_sheet_print_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/michael_abrash_black_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/9521/8594/files/how_to_gain_confidence_in_public_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0429/6658/1407/files/64770327404.pdf
    • https://cdn.shopify.com/s/files/1/0431/8248/9762/files/gedogaxafoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/dell_optiplex_790_i3.pdf
    • https://cdn.shopify.com/s/files/1/0439/9353/0526/files/juvujepopase.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffa8688089a64fd181585a1459adc7e0.pdf
    • https://static.usrfiles.com/ugd/0c268c_62ef5e41713e4616bdcedadcf4496fc2.pdf
    • https://static.usrfiles.com/ugd/e78b77_7275ae528d6f4b619233842185444e7f.pdf
    • https://static.usrfiles.com/ugd/77d535_85dccf7f771a4d618b46dfadf065d6db.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_f0466e589ed042cb8982858a119912c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3b7f89ebf664e7781ebe8447bac87b9.pdf
    • https://static.usrfiles.com/ugd/b13fd1_498875105bcf4a0b9068977b48161907.pdf
    • https://static.usrfiles.com/ugd/b8c837_040c7584a9a24ecc9a3cd31e372d9080.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_off00006891.bin
f88e4671c93c6d4ba099f199458c17861a48362df6839a7f23b8634866416cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 5340 bytes
font_01_sfnt_off00007a88.bin
22a29601e971b15777f4c2c7e0a95d19d2f47eea730953cdc31d2e2e19da0ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A88 10196 bytes

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