Malicious PDF — malware analysis report

Static analysis result for SHA-256 d679e5ee47e78af1…

MALICIOUS

PDF

43.6 KB Created: 2020-08-04 17:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e93ca6ce22a0f48fa521d76da04a153d SHA-1: d10e2e949f1949eaaf5f7f70d41c7f41eac83434 SHA-256: d679e5ee47e78af128e24065c619e9092b7978513f36da9c3b571c8c0c302a25
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to manipulate search results or distribute further malicious content. The primary malicious URL identified is https://ttraff.cc/wb?keyword=no%20woman%20no%20cry%20ukulele%20chords%20pdf.

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=no%20woman%20no%20cry%20ukulele%20chords%20pdf
    • http://files.doodadsandfandangles.com/uploads/1/3/2/6/132680901/ronifawodizod_setupuvosukuf_wewofokodefeju.pdf
    • http://files.hemmohonkonen.com/uploads/1/3/0/7/130776641/5698216.pdf
    • http://files.mountainviewhairsheep.com/uploads/1/3/1/4/131453429/xenijeribovedejuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/86942122379.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/multiplication_and_division_word_problems_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0450/8883/3701/files/mario_vazquez_gallary.pdf
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/74844381920.pdf
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/pukux.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9067/files/6668393797.pdf
    • https://cdn.shopify.com/s/files/1/0434/0219/9196/files/mathematical_symbols_and_their_meanings.pdf
    • https://cdn.shopify.com/s/files/1/0430/7202/8823/files/bulesilakojaboruguvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/mapaguw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4588/7905/files/wunetuki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/40482050816.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/22360252175.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/38447342450.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_off00005cc3.bin
a0a2e790ad63358e2f0a1140cf5b486b82fa15d7385ba882b79634d2295f98ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC3 5620 bytes
font_01_sfnt_off00006fd2.bin
6b97b3d6e636efda89e13c42bc3bc19c1806632bba86908c167156e8b1431771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD2 15504 bytes

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