Malicious PDF — malware analysis report

Static analysis result for SHA-256 015231c4f5c9ce6e…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 20:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4cd378195e1bb18566bbadfbb437f32 SHA-1: 607eaadf6facbe69f7b3ae6dfd8a99021939d2bf SHA-256: 015231c4f5c9ce6ef1dd361946420d37635f16e09aa206d01fa1093630b6ee33
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and embedded links, masquerading as a tutorial for Autocad 2016. The primary link, 'https://ttraff.cc/pify?keyword=autocad+2016+complete+tutorial+pdf', is identified as a malicious redirector. The document also functions as a link farm, hosting numerous external PDF links, many of which point to Shopify domains, likely for SEO manipulation or to obscure the malicious intent.

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=autocad+2016+complete+tutorial+pdf
    • http://fekefima.carpetcleaningstpete.com/uploads/1/3/0/7/130739206/8269279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5000/0796/files/which_of_the_following_best_defines_scheduling.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/zesokibikaxuwado.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/51431669362.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/goxajutixiwogop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/pejujodidewopiduwajebi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5403/1270/files/xuferozovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4581/files/calorie_counting_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/67359429047.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/filoxumujiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/tudidoxoxavedezudiweg.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_off0000659f.bin
a2922be6bb28e11c552eefb2a2bc46d6096d42d75d7429bf926fd6bbf930c92a
pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5592 bytes
font_01_sfnt_off00007887.bin
02b0a840a833dedf77c502eee68870ca6e7fc9e841e8076f491223294c65ca03
pdf-font-stream PDF embedded font (sfnt) at offset 0x7887 9520 bytes