Malicious PDF — malware analysis report

Static analysis result for SHA-256 11652de915d79be2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-12 08:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24428a02a25c77fd4e0f389cd0934dd6 SHA-1: d860b3f04d0449580eedd2175b51762beca0f0b8 SHA-256: 11652de915d79be2f3a24d29d7bc7496780675714ec8d2546348b36329b6807a
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a known malicious redirector, disguised with a lure related to a fitness program. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the document's structure and embedded URLs point towards a phishing or redirection scheme.

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.ru/pify?keyword=kinobody+superhero+bulking+program+pdf
    • http://files.spinecarechiropractic.net/uploads/1/3/1/3/131384018/30437.pdf
    • http://files.synbim.co.uk/uploads/1/3/1/4/131438353/wesutepaxa-vafepitaxaj-rixukinetafutu-gigulepetazub.pdf
    • http://files.ecautoelectric.com/uploads/1/3/1/4/131437005/sizedivorolapasa.pdf
    • http://files.andrewshielscomposer.com/uploads/1/3/0/8/130874257/bedib-zekibupumigogeb-bufoko.pdf
    • http://files.massivemomentumnation.com/uploads/1/3/0/9/130969446/kutekapugupi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0664/7707/files/mcculloch_eager_beaver_chainsaw_covers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/centrales_electricas_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/dixiwumapozov.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/polymer_chemistry_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/peridapizux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/jifuzarajinuraruxutofejad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/77256273707.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/51602586201.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/teach_like_a_champion_field_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1373/3534/files/7486275430.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/o_ceticismo_filosfico.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/21094623479.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/cours_de_l_astronomie.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a7.bin
20e79023b58057486a0b38abfdd611a0cfc00d85e8f88848bef98ebe364240ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A7 5532 bytes
font_01_sfnt_off00007840.bin
6b608d196b0bd5b2d8e7282ec0ab25f01a75a0b5f80f1e806565676c412f2288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 10036 bytes
font_02_sfnt_off00009a7e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7E 4324 bytes

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