Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d648ddff4c0934…

MALICIOUS

PDF

43.2 KB Created: 2020-08-27 22:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fb413d237d7046955440e5801bbf991 SHA-1: c7eafd9712689eb10e880e3941d91d356bd11f3a SHA-256: 73d648ddff4c093455680b10ce3bdd0560a97a4306de491ebb3e911b49d5242c
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that leads to a link farm of numerous other PDFs, indicating a phishing or scam attempt. The embedded URL and the document body text suggest a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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=what+fraction+is+equivalent+to+3+5
    • http://files.cranfordfishstand.com/uploads/1/3/1/3/131384281/zavuzaxetas_fosiramawaker.pdf
    • http://files.sellingmomma.com/uploads/1/3/2/7/132740498/8292380.pdf
    • http://files.whwrestling.com/uploads/1/3/2/7/132740234/seriterab-nukig-tokaw.pdf
    • http://gutobesaj.cleanasaurus.com/uploads/1/3/1/0/131070331/43685.pdf
    • http://files.art-camp.org/uploads/1/3/1/4/131406448/rurokidoderakaw-zezujaziba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/pabir.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/fepirepoleraripe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/79030223231.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/donujumaseva.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/sample_business_plan_for_high_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0440/5470/8389/files/89697881315.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7914/files/15908537643.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/14685990799.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/vomuzafofobizozetesusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/sulexuvu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3120/5787/files/32150874561.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0743/files/rimazob.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_off00005bec.bin
fb1069ec2fe8ebfcaf25e3fb6edf0456f2284434323c13fea75d31d90b08d13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEC 5340 bytes
font_01_sfnt_off00006e21.bin
fb8ae48133b53455b32c1f4602c6c81a90e773f31342c0cafb5c2ab90be1c422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 10440 bytes
font_02_sfnt_off000091c0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C0 4324 bytes

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