Malicious PDF — malware analysis report

Static analysis result for SHA-256 b667baecb3d7f8e8…

MALICIOUS

PDF

35.4 KB Created: 2020-09-01 02:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fabc11facd5d8309ef399fcafb23ca50 SHA-1: 7e23ffe9c1b10269511d0f338c1a3c5ae94dc339 SHA-256: b667baecb3d7f8e86dd8281635995145c19e29cf2ffbfb7a8c5a5a87f24ff3ac
152 Risk Score

Malware Insights

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

This PDF was identified as malicious by a machine learning classifier and contains a large number of external links, many of which point to SEO-optimized PDF files. One of the embedded links, 'https://ttraff.cc/wix?keyword=banjara+teej+video+songs+free', is flagged as a known malicious redirector. The document body appears to be garbled text, but the presence of the redirector link suggests a phishing or malicious content delivery attempt.

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/wix?keyword=banjara+teej+video+songs+free
    • https://static.usrfiles.com/ugd/b8c837_666dccc875de4a9b890f7e5c2c0f4a59.pdf
    • https://static.usrfiles.com/ugd/c068f8_19e6fcedb42b451894c19ce3b254e612.pdf
    • https://static.usrfiles.com/ugd/a86d68_f8f5be90fcff4e369493dc5fd24b5408.pdf
    • https://static.usrfiles.com/ugd/7c30af_314c34aef6a24624a5cc17aeb4175b61.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_1d0a4b3ae78e4bc3af17b550a2c44191.pdf
    • https://static.usrfiles.com/ugd/5ad03d_b13006c6566d4861b5bda1256cc754fd.pdf
    • https://static.usrfiles.com/ugd/8127dd_07c49696e17d4270b97d3bd4189eca73.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_7dad6b6e84ae4e9e855baea93b28a7ed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/81431494260.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/34025465607.pdf
    • https://cdn.shopify.com/s/files/1/0449/1352/4891/files/pdf_girl_scout_promise_in_sign_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/21913707067.pdf
    • https://static.usrfiles.com/ugd/b8c837_92c89f0ed4484e788e34c4f08e9f3aa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa2cf6b96ada42b1abdcefda0868898e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3ac721f6209430e97512b755d429ab6.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_off00004d19.bin
19e1d30e8c1ce800d1b37361b2e4c32b8a91d05ae92ebe109e9475b3ce60069b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D19 5228 bytes
font_01_sfnt_off00005f04.bin
f19701ef41f8a20ec94a0b14c23cb35ea61e53a636968c20cd5dc5f134b1edff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F04 9864 bytes