Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab38039e41e3e477…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 11:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebe05a40931965ec5abe100d4c5a2b95 SHA-1: 7008e7b1dca2c61c4cda84929a068bc819dc769d SHA-256: ab38039e41e3e477aec052375c71ce93a81fa0da832b0f484d68a3e0eeccada1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=anger+management+worksheet+pdf'. This URL is embedded within the document body, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness. The document appears to be a link farm, with many embedded URLs, likely to distribute malicious content or engage in SEO abuse.

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=anger+management+worksheet+pdf
    • http://files.alamoccchurch.com/uploads/1/3/1/0/131069789/f068275afb1.pdf
    • http://pupolul.clarkpiperepair.com/uploads/1/3/1/6/131637016/5d040c95f79d.pdf
    • http://files.casa-de-colores.com/uploads/1/3/0/7/130776162/1873473.pdf
    • http://files.japanskitours.com/uploads/1/3/0/7/130775596/7222687.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/76852571596.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3398/files/52_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/94778922414.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/planet_fitness_cancellation_letter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/11276888094.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/34766598049.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/kefatemekitozewepagovila.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/ontology_learning_and_population_from_text.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/motepiriponafozujedun.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_off00005fdc.bin
ffcc645fcd59d606923d54a78696b578a7107b1e051988db01f885e28d9fe46e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDC 5308 bytes
font_01_sfnt_off000071c2.bin
3f821765c4d0a8f60faa1e7733f01097f0859a413b7597f776a91ad0bfcad751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 10132 bytes
font_02_sfnt_off0000947b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x947B 4324 bytes

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