Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faf4242c2542ab8…

MALICIOUS

PDF

60.2 KB Created: 2020-08-19 01:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a511b376d78e4d3954d4e9884ab99493 SHA-1: f18edbb75ba1918100106859fe20086e82285a86 SHA-256: 0faf4242c2542ab83c8b8253b8ab752217d453eec302696c158c3817cb78f756
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports this. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.ru/pify?keyword=the+adjustment+bureau+full+movie++480p
    • http://files.jenartistbarker.com/uploads/1/3/0/8/130813509/xagifek.pdf
    • http://files.theajingroup.com/uploads/1/3/2/6/132695200/9507129.pdf
    • http://lexuza.fruitandseed.com/uploads/1/3/2/6/132683459/xijefepu.pdf
    • http://files.caseyjohnsondesigns.com/uploads/1/3/0/7/130739864/6994137.pdf
    • http://files.serangdentalassociates.com/uploads/1/3/2/8/132814096/e5fe9005.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • http://www.fontrix.comhttp://www.nhncorp.com
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/20865667669.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/78315698722.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/86686134649.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/new_hollywood_horror_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/33390753642.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/alter_ego_2_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/15305167388.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/77211566348.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/14696827732.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/business_english_conversation_script.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/
    • http://scripts.sil.org/OFL
    • http://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000626b.bin
3cf530485112998b91ffbc67f91ea138786d49c904d396618e2a8e00506858fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 5928 bytes
font_01_sfnt_off00007678.bin
87985804ebf98b1030980f20b4e39595e1aa76caccafc3e7d64f2ca02509db1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7678 20968 bytes
font_02_sfnt_off000096a9.bin
5e0676e134781f2a21c06a0d045eebc95ad2f72f5ed7fc876ffdcead7ccbe471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A9 2276 bytes
font_03_sfnt_off0000a073.bin
c639e9acad76dbf04147d98136081dec1e0f9e8730bc6891a482e5a5245c80f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 10516 bytes
font_04_sfnt_off0000c437.bin
e5f30af547b55dfbbae63869c45e93d04e829a64999393572a2275da8290585e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC437 2056 bytes
font_05_sfnt_off0000cd25.bin
73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 16060 bytes

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