Malicious PDF — malware analysis report

Static analysis result for SHA-256 03acf784bcd61775…

MALICIOUS

PDF

40.1 KB Created: 2020-08-14 02:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41702a8efa94b1c8029d30cdb0627021 SHA-1: d06e8808e044ee0d7ad3108c16d43dcad71abcec SHA-256: 03acf784bcd61775504930253119c529970ff7ca96960404806f30777b5dcc98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a phishing or spam campaign. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of outbound links suggests an attempt to lead users to malicious 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.ru/pify?keyword=airplanes+bob++free
    • http://files.terriemckee.net/uploads/1/3/2/8/132815854/rukibej.pdf
    • http://luzaxifo.prietospoweralley.com/uploads/1/3/0/8/130874012/3184775.pdf
    • http://files.deepaklalsaini.com/uploads/1/3/1/4/131437878/zisoguziwoba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/asientos_contables_ejercicios_resueltos_peru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30611133668.pdf
    • https://cdn.shopify.com/s/files/1/0432/4373/3154/files/argent_crusade_rep.pdf
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/algebra_2_practice_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7688/files/folding_adirondack_chair_plans_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0283/0745/files/lagu_amelia_terbaru_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/twisted_treeline_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/vufikufasinegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/happy_birthday_cake_photos_com.pdf
    • https://cdn.shopify.com/s/files/1/0436/8095/6569/files/rodubobewamojikotazuze.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/lamisebaxamuxexe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7732/7265/files/accuweather_newport_news_va.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_off0000602e.bin
4aaa21a06fe2bddd4f87c90a866197a63a9ac7d402117abbdbc8643e35d7fb25
pdf-font-stream PDF embedded font (sfnt) at offset 0x602E 5024 bytes
font_01_sfnt_off0000713f.bin
6334994b5b2d09c87fa80af17891814cf3717ab8d203ae258a80a75c0dddbede
pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 10184 bytes