Malicious PDF — malware analysis report

Static analysis result for SHA-256 63342a4227460660…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 18:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 432df5a7a9764ceed687390a4f87cb19 SHA-1: c073fb2bcb9a20836ff69d1941f9c744accca5be SHA-256: 63342a4227460660e36cdc039e5a329a10ac7a3f94b4fa7c54a847e8ed8e760a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a malicious redirector URL disguised as a 'Lululemon women's size guide'. The ML classifier and critical heuristics strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of numerous links suggests an attempt to drive traffic to malicious or SEO-spamming sites.

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=lululemon+women%2527+s+size+guide
    • http://files.activitymatterslab.org/uploads/1/3/0/7/130776521/7889d3c1b5f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/the_trial_and_death_of_socrates_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdf
    • https://cdn.shopify.com/s/files/1/0435/6833/2959/files/67232421267.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/discord_servers_to_make_friends.pdf
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/formation_covadis_2004.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/xilavov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/xanirab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/zefiweju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/acknowledgement_receipt_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/sevijadejopuxumowexew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/pavetosulikolewubokakoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6970/9217/files/network_science_albert_lszl_barabsi.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_off00007680.bin
c00e42ae8e38fd2cecfd4d3888ae3bd1aa6330c35ce88e0af9d185542c2c0f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7680 4956 bytes
font_01_sfnt_off00008774.bin
0749e816d4db64a22a4eb1fd9ca2a29dac0ff7a407ccbd11609bda2f2b420bfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8774 10488 bytes