Malicious PDF — malware analysis report

Static analysis result for SHA-256 45219f60a0b36f1f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-08 09:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6cbab3aab700f6840075ab020977614 SHA-1: 6820990fac67def7b0f792e6712f4ca3a6357b33 SHA-256: 45219f60a0b36f1f2c221281ae736417a5bf929974eb0f92dd470883f9b0344e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into clicking through to further malicious content. The document body, though heavily obfuscated, contains references to financial management and a URL that appears to be part of a link farm. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive link.

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=problems+in+financial+management+pdf
    • http://files.raincityultimateclub.ca/uploads/1/3/1/4/131406348/liwukikotefu.pdf
    • http://files.notjustwire.com/uploads/1/3/2/7/132740892/radadazidovatimaraw.pdf
    • http://files.mikeslea.com/uploads/1/3/1/3/131379384/1e22a7e.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/birads_radiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/galiregewupitokot.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/80745157240.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/gomawedalolexosore.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/43349382708.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/caramelization_process.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1045/files/80373862318.pdf
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/self_signed_wildcard_cert.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/nujikazu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/xaxobobejajisasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/90973787090.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006468.bin
eec76e16aa0d79c89bb67f13c84861c0666cf0a288eab673842d099cf3a61498
pdf-font-stream PDF embedded font (sfnt) at offset 0x6468 5616 bytes
font_01_sfnt_off00007765.bin
68e47631e088230bc7929a863aa140f62be6869056cccde2963edc7e26c52d7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 10332 bytes