Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5cb06101ce940d…

MALICIOUS

PDF

58.8 KB Created: 2020-07-26 15:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cdf37a4df4689c9624a684ba541df06 SHA-1: c81b908c7165c2852dece99ecf0fc732785b7eb3 SHA-256: 5d5cb06101ce940d47947febcfb042ffac5de32fb60e197d33e3a22890c6eb36
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for a datasheet, aligning with a phishing attempt. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=brocade+6510+datasheet
    • http://files.face2.ca/uploads/1/3/1/3/131398221/7585785f5a47.pdf
    • http://files.southlandfamilyclub.com/uploads/1/3/1/3/131379371/e862cb.pdf
    • http://files.basilicainvestors.com/uploads/1/3/1/3/131379590/c54dbc956c57.pdf
    • http://files.accountinguci.com/uploads/1/3/0/8/130873907/wafizelov-josekijaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6153/3082/files/12396666076.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/zumatowubixesasapono.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/kijunomidodekaxisuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/75794499823.pdf
    • https://cdn.shopify.com/s/files/1/0433/8230/9029/files/75285168099.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/89622730984.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/bulumototak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/muzasimufixatov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/dukegusizezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/tovuduvoruvimu.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_off0000a7e3.bin
c2d878ce4b9533fa2a413ab3e2e687d0be537f51d01742e7f7e26e43970afab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E3 5152 bytes
font_01_sfnt_off0000b977.bin
ac61311d938bf25440948d7bcee21c45e78eaf51d68bf28dfa77d2e23d812cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB977 10676 bytes

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