Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f391b7c2c4e8bdd…

MALICIOUS

PDF

53.5 KB Created: 2020-08-19 14:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3a9928016acc7fd29f28f23bf335fb3 SHA-1: 09f4f127c3007f670f29584d4619282762adfe43 SHA-256: 2f391b7c2c4e8bddbdd58aafbd58ba7157af1e4dae42a7cac3ed82396ab2c339
154 Risk Score

Malware Insights

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

The PDF contains a lure for a "game bully pc highly compressed 10mb" and embeds multiple links. One of these links, https://ttraff.com/pify?keyword=game+bully+pc+highly+compressed+10mb, points to a known malicious redirector. The document also features a large number of links to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=game+bully+pc+highly+compressed+10mb
    • http://files.zenvapour.co.uk/uploads/1/3/1/3/131379781/888993.pdf
    • http://golimude.rareearthsmiths.com/uploads/1/3/0/7/130739069/siguk-dekojun.pdf
    • http://files.angelaeastwood.co.nz/uploads/1/3/1/6/131636737/jekisu.pdf
    • http://files.yhwhourrighteousnesschicago.net/uploads/1/3/1/8/131856723/wujadubefeti_pefaja_kejasug_lasapedubun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/fifopovule.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6253/files/54260526048.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/9459214799.pdf
    • https://cdn.shopify.com/s/files/1/0438/8339/7272/files/42709924853.pdf
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/additions_to_esther.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/98339682390.pdf
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/2nd_grade_plural_nouns_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/31254018949.pdf
    • https://cdn.shopify.com/s/files/1/0429/9030/5443/files/9931439631.pdf
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/general_prologue_to_canterbury_tales_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/80886364735.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/posapijafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/pijelituxerijofe.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b0.bin
63fd231d80ba11ee3f76aba09b07165bf3c0591b81a9d0ca57efecb9f1ffdef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 5648 bytes
font_01_sfnt_off000074e4.bin
fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 2140 bytes
font_02_sfnt_off00007ebe.bin
d6d45a42fea3c809c689c3db45d9ac5599c6d2c8fa04ecd48dc7394d64a57b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBE 11676 bytes
font_03_sfnt_off0000a4f5.bin
d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F5 16132 bytes
font_04_sfnt_off0000b9ec.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EC 4324 bytes

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