Malicious PDF — malware analysis report

Static analysis result for SHA-256 fababb4b7bbe6b7f…

MALICIOUS

PDF

55.1 KB Created: 2020-08-22 19:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd1b493db1decca368dff6117e73dfbe SHA-1: 9380578b9a04f91937ba38e1497c1915206757b1 SHA-256: fababb4b7bbe6b7f53f47cbe603e7a68c26c93a33eb1cb94f61f6462b0448d9f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=sheetrock+installation+cost+per+sheet'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on potentially compromised or attacker-controlled domains, further supports a malicious intent, likely for phishing or malware distribution.

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.com/pify?keyword=sheetrock+installation+cost+per+sheet
    • http://naket.kaygimmestad.com/uploads/1/3/2/8/132814930/449c96881f9d93.pdf
    • http://fivugugu.angelaherbert-hodges.com/uploads/1/3/2/7/132740763/1775cf58f.pdf
    • http://bisadusik.easthamiltonspiritualchurch.net/uploads/1/3/1/3/131383657/624426425dd8e7.pdf
    • http://files.horanginim.com/uploads/1/3/0/7/130775655/9196580.pdf
    • http://mijugi.melchersacredheart.com/uploads/1/3/1/4/131437919/sidolavok-muwoz-lezowoweregar.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/sum_41_wikia.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/89858744146.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/19728877644.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6119/files/1997_lexus_ls400_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/turob.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/desired_capabilities_for_android_in_appium.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/xoraviratamipijofeludi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1569/0650/files/terapia_epigenetica.pdf
    • https://cdn.shopify.com/s/files/1/0430/9486/8122/files/278401242.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/47452176898.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/lars_brownworth.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_off00009834.bin
c1f72a78e84b16502093bad6ba544b0301d76119533a7ccd81cea0e799be7116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9834 5188 bytes
font_01_sfnt_off0000a9cf.bin
2b6263ecf7a8648ba85a75c5673f78611e6bfe585bacc6a0509b2dfa59fbef97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CF 10896 bytes

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