Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6d6088d9c4015e…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 04:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d7d738c388c30364b39841b6e60c807 SHA-1: 5756a8892c8a39cb8c395fdd76ecfe6c763039c6 SHA-256: 1a6d6088d9c4015e67405668f6366e5aa2d55aaf4fd9a3ef0b6979f7e6854d56
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one identified as a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious redirector URL and appears to be part of an SEO poisoning or phishing lure. The presence of numerous links, many hosted on Shopify, suggests an attempt to distribute malicious content or phish users through a link farm.

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/wix?keyword=manual+tire+changer+harbor+freight
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/jasper_reports_latest_version_maven.pdf
    • https://cdn.shopify.com/s/files/1/0446/7975/7977/files/android_10_gesture_navigation_app_drawer.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/kimuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/active_passive_voice_rules_all_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/lekurifaxexujuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/11943158178.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/31917196577.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/ledat.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/72596192392.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/boy_scout_handbook_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/vijunusakivumam.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8710/files/tebobafuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/84535734182.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_off00006a4e.bin
e09707dbc6afc62e3777a53bc89facaf8b3523f051e840991265f80eb71ceb4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 5112 bytes
font_01_sfnt_off00007bac.bin
394c2176fc5f1fa6f1dc64431ab255c4b31cf63a43007ce5740dcb315e7352ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAC 9748 bytes