Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1263da71640c37…

MALICIOUS

PDF

40.7 KB Created: 2020-08-30 06:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2646233073f5d321cb2f38e30a3cdd0f SHA-1: 4d753cefb230371ae98573ac8cc1947a50060a01 SHA-256: cb1263da71640c37da0982a0b26ff26765089ec6ad0443f88807c6c078a9f00d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.com/wix?keyword=scheppach+hms+260+ci'. This link is likely part of a phishing or scam campaign designed to redirect users to malicious content. The PDF also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm techniques used to artificially inflate search rankings or distribute malicious content.

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.com/wix?keyword=scheppach+hms+260+ci
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/aircraft_aeroelasticity.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/16121753025.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/makelaterukapa.pdf
    • https://cdn.shopify.com/s/files/1/0450/9057/0405/files/dnd_5e_char_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/45536198859.pdf
    • https://static.usrfiles.com/ugd/79cb75_63c0f330225f4449b65b99ef78e4628b.pdf
    • https://static.usrfiles.com/ugd/b65acf_24ac7c1259514ba2bf1e805a2fd9cad0.pdf
    • https://static.usrfiles.com/ugd/ecec20_64835e07c05441f79cf075f893c41167.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/auberdine_flight_master.pdf
    • https://cdn.shopify.com/s/files/1/0448/4068/1633/files/multi_step_income_statement_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/4435/5739/files/71713693552.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/alhambra_guitar_music_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/23979851067.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/blues_chords_progression_piano.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/lab_volt_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/vilumutuziwebefug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/alter_ego_a2_gratuit_avec_cd_audio_mp3_gratuit.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_off00005ffa.bin
308e97cea9975784f4e45e4184dae1c94ecaf776b2e2798d6444b4e64a55130f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 5576 bytes
font_01_sfnt_off000072ce.bin
1ba00e341b50f1f936b3a98fedf90652a73a42917a67f17399b38aeea31fb412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 10336 bytes

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