Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a289efb6cb94366…

MALICIOUS

PDF

47.9 KB Created: 2020-08-11 21:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fceaca15cba928039394c9d24484ae64 SHA-1: a9ff02559ea43ae21ac8eacd7ff73dfad9d8dd4f SHA-256: 9a289efb6cb9436685b76f94425bf95725e530d20d2142cd42531ab9d0570052
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body itself contains text related to 'Adjektiv p 0 svenska pdf' and includes the malicious URL, suggesting a lure for users searching for specific PDF content. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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/pify?keyword=adjektiv+p%25C3%25A5+svenska+pdf
    • http://bupoxudi.diedhardlaughing.com/uploads/1/3/2/7/132740214/varomaso_jupuv.pdf
    • http://dopuxur.trinalang.com/uploads/1/3/1/3/131383314/1f4313075.pdf
    • http://files.texaswolverineallstars.com/uploads/1/3/1/8/131871614/wipesazoto.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6351/files/luviwamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/chaconne_bach_violin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/pusogonifufelulabarifize.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/vunosaxima.pdf
    • https://cdn.shopify.com/s/files/1/0430/1363/6259/files/metabolismo_de_lipidos_en_monogastricos.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/vedugimeburumumeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/88341304971.pdf
    • https://cdn.shopify.com/s/files/1/0439/1570/6523/files/barron_s_toeic_practice_exams_audio.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0449/7919/1966/files/beetroot_poriyal_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/bollinger_bands_settings_for_scalping.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/roronapamejagirodufufozik.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_off000070c8.bin
d9749968e6561c06fd67585401edfe15514ec7920a3cf7e2556fc12fde4f76d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 5080 bytes
font_01_sfnt_off00008192.bin
90319561bc57fdcf7b31bcdad1c41c5f1a9b05009a26b13b687e21a03bf85bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8192 10252 bytes
font_02_sfnt_off0000a2b8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B8 4324 bytes

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