Malicious PDF — malware analysis report

Static analysis result for SHA-256 886e9341afeb0444…

MALICIOUS

PDF

45.4 KB Created: 2020-08-08 08:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 04382220aafc6b070ad0d942c59afe54 SHA-1: d033f9c9bd283acc79c0542e9aa6dbec7cbd7da0 SHA-256: 886e9341afeb04445c6099c6ea53f322e802fc5c79f5a9bfeb7d034a39f869ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service designed to obscure the final destination. The primary malicious URL identified is https://ttraff.ru/pify?keyword=math+101+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a "Math 101 pdf" lure, likely intended to trick users into clicking the malicious links.

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.ru/pify?keyword=math+101+pdf In PDF document text
    • http://files.shopslothlife.com/uploads/1/3/1/0/131070767/pixejarur-lerekilururum-kiwosudedalin.pdfIn PDF document text
    • http://files.forestvilleanglican.com/uploads/1/3/1/4/131453124/befifokomava.pdfIn PDF document text
    • http://files.mooresensible.com/uploads/1/3/1/4/131406288/5dfcf2ee.pdfIn PDF document text
    • http://files.childrenofthekingdom.net/uploads/1/3/1/1/131164431/dedajelefewite.pdfIn PDF document text
    • http://files.ushospitalitygroup.com/uploads/1/3/1/4/131406717/593e5c025d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1985/2187/files/13219114642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/71744967358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/bewikobamabilusoxabeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/76330418321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/20143099916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/ninukenepawifem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3133/0969/files/jewolow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1775/5034/files/fracaso_escolar_en_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2266/3331/files/naxobaterosus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/bozurewobedudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/91707698031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/fm_21-_75.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000681a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 4428 bytes
SHA-256: d9ba6593c566689ebf1326eda41eeacd0a73a17e52f636bd14e036f5427e9399
font_01_sfnt_off0000772a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772A 10832 bytes
SHA-256: 8195726202460b47137b76d5a7631955cfff49eb9dcf39c3136a2216512a4e6f
font_02_sfnt_off00009ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AC9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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