Malicious PDF — malware analysis report

Static analysis result for SHA-256 62da509c4a61063f…

MALICIOUS

PDF

34.6 KB Created: 2020-08-11 01:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c720a9b1e2909aa82a350155a329c6d2 SHA-1: 9b3712f7a76401aacae7763229deecebfa8a60fd SHA-256: 62da509c4a61063f6d717d1d3e873f375f22a6e8fc7df59a5747fd8677d08da1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector infrastructure. This suggests the document is part of a link farm or phishing campaign designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=robotica+pdf+completo
    • http://files.kathleenokeeffe.com/uploads/1/3/1/4/131452858/tapirekilogolizuxaf.pdf
    • http://files.cyclingcatalonia.net/uploads/1/3/1/3/131398253/dorozivenupul.pdf
    • http://files.counterpointstat.com/uploads/1/3/0/9/130969735/sibizereze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/vazavusixemotu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/tennessee_driver_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/56240568820.pdf
    • https://cdn.shopify.com/s/files/1/0435/0358/3384/files/toxudumegozuzevaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/mcculloch_chainsaw_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/nidavafixoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/gujonafebirabulusil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/john_deere_sx75.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/bodiwisufovipilefej.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/dowojijorebomowobuvo.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_off0000497c.bin
97d4411749965c9994a634cb527e8f65c08cc8c2a4179f4024522f105951cd35
pdf-font-stream PDF embedded font (sfnt) at offset 0x497C 5176 bytes
font_01_sfnt_off00005aff.bin
ac814aa10ba961ea77631b59e6c3a978f33418e38318909577dbb1fcda597331
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFF 10264 bytes