Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d66ea85bbda5cc…

MALICIOUS

PDF

58.4 KB Created: 2020-08-10 22:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dba180f90bd53266efe9641ccb59f80b SHA-1: d7accd14bde27edc77f161cbc29bd11f82fb9c12 SHA-256: 34d66ea85bbda5cc3cd6837c0198e350e74a2af601af3c9657b444cb51bf4f57
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=capitales+des+pays+d+afrique+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=capitales+des+pays+d+afrique+pdf
    • http://files.columbiapage.com/uploads/1/3/2/6/132696174/eee9261c2294d0.pdf
    • http://zovudeg.hebrewdayschool.org/uploads/1/3/1/6/131606490/1d92066e96c7.pdf
    • http://vuzumo.sinisterkiss.com/uploads/1/3/1/3/131384401/a20a7981.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/52721933013.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/supitixutefumoladil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/reddit_story_of_seasons.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/tagibotavuposopotofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/79453690762.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1473/files/simone_de_beauvoir_la_invitada.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/lujewekutebowadokubonap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/17939229898.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_off0000886c.bin
c8563a6677f703641af10c8fb3ed2a09d3ec2003742fd65804e369b5605708d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886C 4952 bytes
font_01_sfnt_off0000995c.bin
221adfdb85987a94c6246fc437a7651cc08402d2b15f0671268fd415401001e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x995C 17376 bytes
font_02_sfnt_off0000cc98.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC98 4324 bytes

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