Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d32e05714523d9…

MALICIOUS

PDF

35.0 KB Created: 2020-08-15 06:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cb1a0d8e5a6a37b067a890e548e2301 SHA-1: ffda6960604c13a475e43d5eb8b7114208149ba7 SHA-256: 34d32e05714523d9eb5fec72687c5eec50d27369088cfe5c9913ddcc721c7b3d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.com/pify?keyword=exponential+growth+and+decay+worksheet+key. The document body, though partially corrupted, suggests a lure related to an 'exponential growth and decay worksheet key'. This combination strongly indicates a phishing or malware distribution attempt disguised as educational material. No scripts were extracted, but the PDF structure and embedded URLs are sufficient for this assessment.

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=exponential+growth+and+decay+worksheet+key
    • http://files.reimoves.com/uploads/1/3/0/7/130739996/19900b31724a3.pdf
    • http://files.soapurebathnbody.com/uploads/1/3/0/8/130815009/kesedizalefujiwubu.pdf
    • http://files.robinhuffmandesigns.com/uploads/1/3/0/8/130874038/d0afc6bab76.pdf
    • http://lutud.shoptcbgreenville.com/uploads/1/3/2/6/132682883/tufiro-kofuv-nufilolotuxubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/metozemudilu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/milataxuritozupedaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/8142757210.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6901/files/medexufoboxomirorigomet.pdf
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/43374926882.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/zanopufofijubeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/7710/7865/files/simon_sinek_find_your_why.pdf
    • https://cdn.shopify.com/s/files/1/0432/5864/2595/files/60219545212.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/tuzinatexumatom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9022/1983/files/11844055272.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_off000041c4.bin
fec76f4b204fbefdb2e34963667bb1666e762b065e0ec4695f97e6f675bf0c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41C4 5404 bytes
font_01_sfnt_off0000542f.bin
1b3070b6f3e380b333f019b879633bff1c79757d790b95325555c351f8da4ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542F 8364 bytes
font_02_sfnt_off000070a9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 4324 bytes

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