Malicious PDF — malware analysis report

Static analysis result for SHA-256 8323b2ec2c8b9cf9…

MALICIOUS

PDF

55.3 KB Created: 2020-08-13 01:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95023b7a18112496fcb7c5d95f07ebe SHA-1: 3f0144a5230c02f8e6a3e2fedc3d8e168725f500 SHA-256: 8323b2ec2c8b9cf94f03822b3b01c6fc10706af2994e8c6c46d3567065155b92
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=asurion+att+affidavit+pdf', which is flagged as malicious. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially engage in SEO poisoning or phishing. The ML classifier also strongly indicated maliciousness.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=asurion+att+affidavit+pdf
    • http://files.rjensalada.com/uploads/1/3/0/9/130969936/gowexozodogifa-nodorujarajiz-bogexeju-kijak.pdf
    • http://files.leahcarolinejones.com/uploads/1/3/0/8/130813528/motonuxomebad.pdf
    • http://files.eyebelieveeyecan.com/uploads/1/3/1/4/131407493/115b85025bf.pdf
    • http://files.missyjkennedy.com/uploads/1/3/0/7/130775063/c1157.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/98046163783.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/volo_s_guide_to_monsters_races.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/1697632306.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3651/files/95095246910.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/negative_personality_adjectives_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/5859/2934/files/tactics_for_toeic_test_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/68811854624.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/3849889491.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/bfa_battle_pets.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/galagivesosan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/48190230832.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/woveloket.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/unqualified_audit_report_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/berliner_platz_1_neu_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009232.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9232 2828 bytes
font_01_sfnt_off00009c2d.bin
e37d70099f7bc3ed2556d866dff0b74e9d31744aaf105c947a29c147b122a339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2D 5052 bytes
font_02_sfnt_off0000ad70.bin
45cc80d43565db8b6f04cd155639fae2155eef69c83787f01209cec0e1a7c0aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD70 10096 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.