Malicious PDF — malware analysis report

Static analysis result for SHA-256 1155e7ce44303664…

MALICIOUS

PDF

39.4 KB Created: 2020-08-31 12:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5770d71109b3c1f2c45ff8c6e3ad8061 SHA-1: 0c93f8b4280e43d2c113bf9c549808114f28f553 SHA-256: 1155e7ce44303664374a79c160c88222a8450a282df997e7de564aaee657aae9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL that leads to the redirector, suggesting an attempt to direct users to malicious content. The presence of many Shopify links, some benign and some potentially part of a link farm, further supports a scam or phishing 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.ru/wix?keyword=dr+atkins+vita+nutrient+solution+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/data_structures_and_algorithms_with_python_kent_d._lee.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/accumulating_positive_experiences_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/lajefu.pdf
    • https://static.usrfiles.com/ugd/b8c837_71256f5b5228421793291c8966e9f96b.pdf
    • https://static.usrfiles.com/ugd/fd3290_849260e9f727411bb4a94b305a075ef4.pdf
    • https://static.usrfiles.com/ugd/99afdc_a3741943cafa481a9012d8e2cb3bbe79.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/84495089258.pdf
    • https://cdn.shopify.com/s/files/1/0428/2823/4908/files/40207179501.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/3765819114.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/nipisolapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/rijalowoziwe.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_off00005d17.bin
75003088b4f2a6407c1a7cc81bd3ca136d8f3a46329453ed31adea3eaf412bc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 5156 bytes
font_01_sfnt_off00006ebb.bin
99363c4d139ac44792c40d6fe7d6f055d1337834ade5e2ccf5425e76f1607e90
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 10064 bytes