Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76fb66be9e458cb…

MALICIOUS

PDF

66.2 KB Created: 2020-08-08 00:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa68b4aa4bcdc4006e62b45ca660bbd4 SHA-1: 2dd480fe317fbc0d5ddb748c10e1c3ba9a19b75a SHA-256: f76fb66be9e458cbdcaacae702723aefb13788f64eee834028952cca76347c4d
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=7+aspects+of+culture+pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to download or view content that ultimately leads to malicious infrastructure.

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/pify?keyword=7+aspects+of+culture+pdf
    • http://files.tonyhardindesign.com/uploads/1/3/1/4/131407901/kemilupotiloxesolosu.pdf
    • http://fajibi.gallowayflowers.co.uk/uploads/1/3/1/6/131607131/geduviselukefewo.pdf
    • http://files.thistlethorn.com/uploads/1/3/1/1/131164351/xuwonoseb_fujumowotadomu_lidebakipuwoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/4058662407.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/balancing_equations_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/how_do_i_push_code_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/zepup.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/32049361416.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puwojadudabub.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/12079597913.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/kaplan_step_2_ck_videos_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/xakik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/zivilaxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/7308197269.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/96014044585.pdf
    • https://cdn.shopify.com/s/files/1/0428/6965/3663/files/butubixunufibepeje.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_off0000b93a.bin
664af0092f2f7f4f3294c9d05b9eadbe1b0b3aac716f77188366a4e0aa6a6033		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB93A 4860 bytes
font_01_sfnt_off0000c9d2.bin
60aabd17db91ef5f107397b905c149a88ec53bb4e759528216e99c3e7b7bd2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 10564 bytes
font_02_sfnt_off0000eda5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 4324 bytes

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