Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bd169f4246ac71…

MALICIOUS

PDF

35.4 KB Created: 2020-08-09 01:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08f51cbc7438dff324f83216928b2996 SHA-1: c3a78e875dc3cbc3e8502e8d972ef8ff87622a5c SHA-256: 16bd169f4246ac71faf2b38959f9fbb5c7a374970ba316e0a150fa353a4f4688
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=edward+said+reflections+on+exile+pdf'. The document body and embedded links suggest a tactic to manipulate search engine results or distribute malicious content through a link farm. While no scripts were directly extracted, the presence of embedded URLs and the PDF structure indicate potential for malicious redirection, aligning with spearphishing attachment tactics.

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=edward+said+reflections+on+exile+pdf
    • http://files.alexiswarthen.com/uploads/1/3/1/4/131452903/jifejuwuv_ropipilos_warakabazo.pdf
    • http://files.myriamurvoaz.com/uploads/1/3/1/1/131164312/wozalakelalo_gixowazitalije_zizaj.pdf
    • http://files.jazzphilosophyfusion.com/uploads/1/3/1/3/131382583/norujuj_tuwemolezipaf_ridevezovoteje.pdf
    • http://files.banyantreesamui-cuisine.com/uploads/1/3/1/6/131606666/jeloritazido.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/59150839753.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/wudatajawafaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/39844036537.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/fanezimupoxuxetorob.pdf
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/xebarivobewig.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/20088670410.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/git_clear_local_changes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/32622404101.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/26992229032.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/69420775413.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/nijenigitotimip.pdf
    • https://cdn.shopify.com/s/files/1/0438/9706/1531/files/nizekune.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_off00004e10.bin
24c2f0c3fb6fabbb143be17661062b4b0605af5eaeb8ed1d54c894d0e04cac58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E10 5268 bytes
font_01_sfnt_off00006024.bin
07e91afc775de1074205fb320d85a3df4869a9dea226a88c026a7748460eabf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6024 9556 bytes

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