Malicious PDF — malware analysis report

Static analysis result for SHA-256 795b5e1d614d8ba2…

MALICIOUS

PDF

40.2 KB Created: 2020-08-07 15:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae4389dace0c27a94267ad24eeb9b6ff SHA-1: 0a99e0759585a0108b1e49ca73a4f1dd03c43391 SHA-256: 795b5e1d614d8ba29d7837cab17df3f37ee1ab29fb88e1dcfe5bfc08b585fa42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The primary link, 'https://ttraff.ru/pify?keyword=larutan+nutrisi+hidroponik+pdf', is flagged as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to engage in SEO poisoning or to distribute malware through a link farm. No scripts were extracted, but the heuristic firings strongly indicate malicious intent through link redirection.

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=larutan+nutrisi+hidroponik+pdf
    • http://files.twc408.com/uploads/1/3/2/7/132712005/a0e58cd93.pdf
    • http://files.yennang.com/uploads/1/3/1/3/131379059/820fe.pdf
    • http://nipijov.sanfordwelcomecenter.com/uploads/1/3/1/6/131636664/lopedilada.pdf
    • http://files.wanderlustironworks.com/uploads/1/3/1/4/131455475/f60ada.pdf
    • http://files.bebettertherapies.com/uploads/1/3/1/4/131483217/sebaretav-gebogojolaw-refiwadafon-zatutovebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/43949206531.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5928/files/key_informant_interview_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/44018388556.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/37040117292.pdf
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/35925604669.pdf
    • https://cdn.shopify.com/s/files/1/0430/5541/5445/files/lawefevikepabatonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/private_hottie_utopia.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/average_aptitude_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/zofogeroxovugubavowi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/xedadugizejerezanitomu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/dadofifuveminik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa4.bin
10141e3435001658991a07ce58ca1cdd3b05c730059bb50ab184955ca7a62c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA4 5104 bytes
font_01_sfnt_off000070fd.bin
5f27e2f6fb3df335cb7589504d4b30d165fedf556deaada4b3b370aa5d641a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FD 10256 bytes

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