Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ac7eff02169fff…

MALICIOUS

PDF

130.8 KB Created: 2020-09-12 18:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caf6fa2985f42ca530ab143c918d821f SHA-1: e660dcc40efa4a452d771595f96492edafefbd69 SHA-256: f0ac7eff02169fff05714d33b7d0a05195ccc771fabe4ca86ae2561d36e0441e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=ias%20test%20series%20pdf%20free%20download'. This URL is presented within the document body, suggesting a lure for users to download content. The presence of numerous other external PDF links, many hosted on Shopify, indicates a potential SEO link farm used to obscure the malicious redirector. No scripts were extracted, but the primary malicious activity appears to be redirecting users to a harmful site.

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.cc/wb?keyword=ias%20test%20series%20pdf%20free%20download
    • http://vowigos.heswallsquash.com/uploads/1/3/2/6/132681237/7594870.pdf
    • http://files.andieileenphotography.com/uploads/1/3/2/6/132695457/sexeser_winaxisivozev_pumibig_getese.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6014/files/blest_be_the_lord.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/57150646505.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/635890237.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/gluten_free_diet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/saucony_guide_iso_44_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/92408071058.pdf
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/free_piano_sheet_music_la_vie_en_rose.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/cell_structure_and_function_test_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/capacitor_value_code.pdf
    • https://cdn.shopify.com/s/files/1/0439/0964/4456/files/25839562293.pdf
    • https://static.usrfiles.com/ugd/5a1791_5c6b2776551f43a49234416b4838f321.pdf
    • https://static.usrfiles.com/ugd/ab059d_a1bd12c76e53480b945a5ac12ce8ce1f.pdf
    • https://static.usrfiles.com/ugd/2f07a1_e7c010e8846146ce8a9aaec5176505a1.pdf
    • https://static.usrfiles.com/ugd/e49726_1201fff8a9794fdc95a4871a453c0979.pdf
    • https://static.usrfiles.com/ugd/c0fca2_9440328e1f9041a2bd712ec6a07f687a.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_off0001b19c.bin
06aa1c7da1ed486788e31782d979f7f5e4936a1273ff19400674482ba53f3a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19C 5064 bytes
font_01_sfnt_off0001c2fa.bin
33e8d7e2d4908605a8a3723a88dd146f66fb040623e206d4cb3e0ed63a53cb28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2FA 10764 bytes
font_02_sfnt_off0001e7cf.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7CF 16164 bytes

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