Malicious PDF — malware analysis report

Static analysis result for SHA-256 24403cb2babe471f…

MALICIOUS

PDF

50.8 KB Created: 2020-08-14 03:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddac8c4d5413e70f06213c95e4edbb4a SHA-1: f05240cb7ae9f60bb5dbb4266d6c9e7085db7336 SHA-256: 24403cb2babe471fb409adcc0ee1c14a13af97189638ec3ff1d1414cac13c9b7
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with the primary redirector identified as 'ttraff.com'. This indicates a link farm strategy, common in phishing campaigns or for distributing further malware. The ML classifier strongly flagged this PDF as malicious, and the presence of a known malicious redirector URL supports this assessment. No scripts were extracted, so the attack pattern is inferred from the link structure and the malicious redirector.

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/pify?keyword=wallpaper+4k+windows+10
    • http://tawuwovu.bea-cambodia.org/uploads/1/3/0/7/130739579/784c2.pdf
    • http://files.mawptacoma.com/uploads/1/3/1/4/131437276/c8a442ec.pdf
    • http://files.ltchunting.com/uploads/1/3/2/8/132814680/ximonazuvaji_jabewamexuvapuf_ketozalefevog.pdf
    • http://gefuko.paleocupboard.com/uploads/1/3/2/6/132681513/juzufetumujone_gogerawabus_zumemo_fotukafab.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/patchwork_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0448/4697/3088/files/patologi_klinik.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/32377324126.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/inquisitor_40k.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/75529984897.pdf
    • https://cdn.shopify.com/s/files/1/0434/1130/8702/files/kerokufesikatini.pdf
    • https://cdn.shopify.com/s/files/1/0436/6172/1765/files/bwt_water_softener.pdf
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/minazatemawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9986/5756/files/halloween_coloring_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/vogatazegoxaletolar.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/15169936799.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/badminton_rules_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8758/3650/files/91401734561.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_off00008869.bin
cc417b64e8101d4590f0d9d9c5b7952268979e3db7e3098bccb344a657e8c4cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8869 5404 bytes
font_01_sfnt_off00009afa.bin
646fb9aabea634afe5ac98ae530d8e42adcac065b57184ef9ff1488d5692a0b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 10344 bytes

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