Malicious PDF — malware analysis report

Static analysis result for SHA-256 790b01daeb991805…

MALICIOUS

PDF

41.3 KB Created: 2020-08-23 17:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a02b16ef0deff0e0621669f02b5a8cc6 SHA-1: d3fadfbf6e1ec40303cc8060381ded3004cbdd31 SHA-256: 790b01daeb991805f1405ad8b3b8f464bae2f6ae77db187804c4fb8a71322180
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, indicating a phishing or scam attempt disguised as a workout guide. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=taylorkayteee+workout+guide+pdf+free
    • http://files.soundsofthesouthwestsingers.com/uploads/1/3/0/7/130739886/9939597.pdf
    • http://files.hydronicspecialtysupply.com/uploads/1/3/1/4/131438490/6355709.pdf
    • http://files.prospectfarmvt.com/uploads/1/3/0/7/130738755/palobawijitos.pdf
    • http://files.bloomingbalance.com/uploads/1/3/1/3/131383045/9346637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/estimation_and_costing_b_n_datta.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/pastilla_reveladora_de_placa_bacteriana.pdf
    • https://cdn.shopify.com/s/files/1/0434/9175/4149/files/peximatapemosoginus.pdf
    • https://cdn.shopify.com/s/files/1/0432/3026/5511/files/approaches_to_social_research_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/nozabupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/fokumiwekunobevipegutob.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/gozinagofoxajupupijubog.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/17599759585.pdf
    • https://cdn.shopify.com/s/files/1/0432/4835/3442/files/91712441412.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_off00006301.bin
f202825171743ca95578bee7ad18fdaa28a2f96521410edcaa4fca3c8b373b2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 5240 bytes
font_01_sfnt_off00007505.bin
3da0b9ff6a16381b8095532255aca5b786b030d5cfdf2637c8946e0de2b7f800
pdf-font-stream PDF embedded font (sfnt) at offset 0x7505 10444 bytes