Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc3d259f9b555c6…

MALICIOUS

PDF

45.6 KB Created: 2020-07-29 20:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd416490e2123ee89e1486ed46fb98aa SHA-1: cec276d046e16823f9452e9cd096da1da22bcb4c SHA-256: 8dc3d259f9b555c6c18f00a0ee543996e4684b6f1c156917e2ebd3f00c10c0cb
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a translation service. This indicates a phishing or malware distribution attempt. The PDF also hosts a large number of external links, many pointing to potentially malicious or benign files, suggesting a link farm for SEO poisoning or traffic redirection. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly suggest a malicious intent.

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=translate+pdf+french+to+english+google
    • http://files.etefl.co.uk/uploads/1/3/1/0/131070602/ddf68724f348e4b.pdf
    • http://files.northlandquiltersguild.com/uploads/1/3/0/7/130775734/9757093.pdf
    • http://files.heathermclaurinart.com/uploads/1/3/1/8/131856195/wuwuvaturunegu.pdf
    • http://files.bostonbulldogsrunning.com/uploads/1/3/1/0/131070115/zisow.pdf
    • http://files.kaimukiymca.org/uploads/1/3/0/7/130775557/jefovi_rewetuxusuraba_jonoxof_tibotemi.pdf
    • http://files.bostonbulldogsrunning.com/uploads/1/3/1/0/131070115/
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/17628143446.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/819224819.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/lajuzevipiwer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/65301643138.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/nukotuzibebikumumotamas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/robamikepabo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/gadupitep.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/33569710638.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/katemejitomumitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/62106603565.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/gugafone.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_off000074db.bin
102eb5b79280b6fe433ca0b60dec2b43aa50e9b804bad35c5a58be8ee0a3e756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DB 5156 bytes
font_01_sfnt_off00008653.bin
ac7a678182e67c9133663adb67e7a78dad28f2ecd2051a93a4c3b3e3d0fb8674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8653 10120 bytes

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