Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a2f33c9b4f24e0…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 13:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea17fca49bd054b0e1abf95527c9f080 SHA-1: ab73994603893cf5e5d4d2b1f81faaea951b7bb6 SHA-256: 86a2f33c9b4f24e03751c712dc2f1c7d48de193dd02d66bca71be9522ef81f5f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=amerika+insan+haklar%25C4%25B1+s%25C3%25B6zle%25C5%259Fmesi'. The document body, though partially corrupted, contains text related to 'Amerika insan haklar1 s�zle_mesi' which likely serves as a lure. 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 improve the ranking of the malicious link. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=amerika+insan+haklar%25C4%25B1+s%25C3%25B6zle%25C5%259Fmesi
    • https://static.usrfiles.com/ugd/7f16bd_d0bd21767e6d48c1980efdbb05e4d3a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_beda5bda9c8546eb983ff3429a0cfebe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b2e90230c841c2ac1b7b735ba3c03a.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc9f49499aad4e9d969b7b51fc7e39d7.pdf
    • https://static.usrfiles.com/ugd/99965f_326306bae8f9491e8d989c005a05c9a1.pdf
    • https://static.usrfiles.com/ugd/fa6f14_e019679e749940b19ecd1551db315331.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/67116549318.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/present_simple_tense_worksheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0462/1248/1177/files/85697423993.pdf
    • https://cdn.shopify.com/s/files/1/0436/8701/8649/files/84883946106.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/secondary_structure_of_protein.pdf
    • https://cdn.shopify.com/s/files/1/0441/2683/0744/files/balu_mahi_full_movie_free_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/51893278992.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/pupogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/54661880117.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_off00005e63.bin
eb7c396886eb5122f7368a5a2740af7f1a870010b6d9b15d0b04532e66b15552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E63 5044 bytes
font_01_sfnt_off00006ebe.bin
39fca5c76e37c9438e0508dd12c6e7752057502de7f34a6176823ff64f9d2a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 10564 bytes
font_02_sfnt_off00009011.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9011 4324 bytes

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