Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8f31f80d0c8dbf…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 04:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04f684b13a035f36fae7ee8adcfe23e1 SHA-1: 2d8223ab52107fb60b2ce10d20785f9cf5e5b029 SHA-256: 6e8f31f80d0c8dbf3fd9e649ae3d138b71491a3c8edfc5b11b2da24048007a06
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded URLs, with a critical heuristic identifying it as a link farm and another flagging a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to URLs that are likely part of this link farm. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword related to date formatting, suggesting a potential phishing or scam lure.

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=bootstrap+datepicker+format+dd-+mm-+yy
    • http://duwuvagal.brightsidesolutions.com/uploads/1/3/1/3/131380771/midoronib_donero_napexawusi_xuwefufevovip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0465/8724/8805/files/baby_doll_song_video_from_pagalworld._com.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zorosibal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5332/files/82863138986.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/8617974100.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/ffmpeg_encode_h264.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/fleetwood_prowler_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3927/6707/files/babysitting_cream_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/0182/9797/files/98364266567.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/fininaneminodopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/33415632979.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c65.bin
5164344112fcb8dd7480083810a64a1ed14a27cfa7be9b2193e6342830a50c9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C65 5516 bytes
font_01_sfnt_off00006f26.bin
d1dd4cf7594110d93bbfa939e0eb26b29b67f48c52a0a566c253d1e706e8e986
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 14940 bytes