Malicious PDF — malware analysis report

Static analysis result for SHA-256 01cc79bc58ddffdf…

MALICIOUS

PDF

33.5 KB Created: 2020-08-11 21:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3ac3f1752c361913884e62c8e518a76 SHA-1: 98f254a79ffce3fb9c35638c88045649a898a1f5 SHA-256: 01cc79bc58ddffdfb20d2b5e7c68788c84e2ad5a9cfc5ff708312f158d3d027e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting an attempt to drive traffic to malicious sites. The heuristic firings indicate this PDF is part of a link farm, likely for SEO manipulation. While no scripts were extracted, the embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users.

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/pify?keyword=comparative+and+superlative+adjectives+worksheet+pdf+with+answers
    • http://files.cldrecords.com/uploads/1/3/1/6/131636841/bukojawite.pdf
    • http://ligiw.nakedvanity.co/uploads/1/3/1/8/131871864/5174916.pdf
    • http://files.asrar103.com/uploads/1/3/0/7/130739126/gesixi-pupakikafutax-nufenagunudux-sokod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4500/3169/files/21189861653.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/xudujudafazowokusapulop.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/words_their_way_elementary_spelling_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/nec_2008_handbook_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/xegolivapokos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/29246645352.pdf
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/minecraft_cops_and_robbers_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/index_of_prison_break_season_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/7871/2472/files/15013828469.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/99336185021.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/nikitixaw.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_off00004452.bin
b37500ff38620b5fa15fdccca8bb0099a8a11e3c0b668069c091c75d4ae8c223
pdf-font-stream PDF embedded font (sfnt) at offset 0x4452 5592 bytes
font_01_sfnt_off0000573f.bin
089b2161124745fc9edc495022b4798ff93bb18c47a274b5604fc962790e4969
pdf-font-stream PDF embedded font (sfnt) at offset 0x573F 9824 bytes