Malicious PDF — malware analysis report

Static analysis result for SHA-256 c983ca1a672c065e…

MALICIOUS

PDF

38.8 KB Created: 2020-08-20 07:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df4ad794d258573e7dabe88870104a3f SHA-1: 7e74800aeedeeaca3bbe3c02dca3a09acafaab6b SHA-256: c983ca1a672c065e144950001d03f412f98ef9bfe0067a976a5be33a9d4c957b
154 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links. One of these links points to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL and other links to external PDFs hosted on various domains, suggesting a link farm designed to lure users to malicious sites.

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=breathe+jax+song
    • http://files.niteknight.com/uploads/1/3/1/6/131606362/260264.pdf
    • http://dudokoba.chinoteaparty.net/uploads/1/3/0/7/130776791/bezuritagib.pdf
    • http://files.kristenandersen.com/uploads/1/3/0/8/130874588/cf448272f232.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/kexogoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1581/files/fanarisutirufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8167/8494/files/modizenobeligefajibegezeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/wikonod.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/veridejirelimasanob.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/pogirenopefazif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/xodotowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/85780448178.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a81.bin
15313aa20856b11635e91fa3411ce38c6657f5bb3074ad48dd422f02e1186341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A81 5108 bytes
font_01_sfnt_off00006be6.bin
f7bd9317bfa11c1f5b1be6ee3f3f21efc98a622d301d920f34fdcc1f78da08d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE6 10548 bytes

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