Malicious PDF — malware analysis report

Static analysis result for SHA-256 23ae3ee0b82a79fb…

MALICIOUS

PDF

53.5 KB Created: 2020-09-03 04:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e10dbca8d10a1cbfeab67c2a70477cfc SHA-1: b4ea5c32e4c697cd94076a39bc1a9860d72fe4af SHA-256: 23ae3ee0b82a79fb9e94c223cca31bd3b7a2a96918e9be5a6486c087c72da83a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.me, which is disguised as an answer key. The document also contains a large number of embedded links, many pointing to Shopify, likely as part of a link farm to improve search engine ranking for the malicious content. The presence of a 'download button' heuristic further supports a deceptive lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/pify?keyword=answer+key+neet+2019+s3
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/14571795923.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/53326369425.pdf
    • https://cdn.shopify.com/s/files/1/0439/6302/3518/files/worepuzawizodawuziba.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/27534259316.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/avira_antivirus_free_full_version.pdf
    • https://static.usrfiles.com/ugd/a44510_c2e026a7f45443e2946ffa2ce8488417.pdf
    • https://static.usrfiles.com/ugd/808cd0_e61b0bf3fb604870a88847f27cca6760.pdf
    • https://static.usrfiles.com/ugd/fe83c3_4d77c6b06c3f470da74b0719d6320211.pdf
    • https://cdn.shopify.com/s/files/1/0436/0192/0157/files/murigemenesidofubolukabor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/mavogoxubapovonolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/95727946371.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/binawijilozaniwapaxubef.pdf
    • https://cdn.shopify.com/s/files/1/0453/3475/7531/files/falling_leaves_adeline_yen_mah_free.pdf
    • https://cdn.shopify.com/s/files/1/0463/5715/1905/files/76117620163.pdf
    • https://cdn.shopify.com/s/files/1/0463/5361/2957/files/regenerative_braking_in_induction_motor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/kuzaloxekexe.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/43969606885.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/11393642057.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb2.bin
03cf1bf2f41c456869bad8a5243ff9ac50a31fedc15aecbec1b6fade5a23bc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB2 5332 bytes
font_01_sfnt_off00007f00.bin
b7e8e9e5e82f6407f712f887ab539b5bce5757a98210c9d848c3d2593bacd3ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 6008 bytes
font_02_sfnt_off00009274.bin
c3f55d870834eedf17bffe72ab174cc5fa4a6f1805e903175a4de5c786014758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9274 10588 bytes
font_03_sfnt_off0000b6c1.bin
911adff499d96fcb26148b021d17e79dc0335afd0ed4763c262a5c24bf46f75d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C1 4896 bytes

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