Malicious PDF — malware analysis report

Static analysis result for SHA-256 72984d29bf68221d…

MALICIOUS

PDF

52.8 KB Created: 2020-08-06 04:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68b115ba1c0706fb1312aa7a6fdccfef SHA-1: 1e5561ffd0ba843e6d43610b0c64bb0d242f51f3 SHA-256: 72984d29bf68221d59ceee66736cf6b097c2636b34d2e67a30290651140fa56d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.ru. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The presence of many links to PDFs on Shopify domains indicates a link farm strategy to improve search engine ranking for malicious content.

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=anandamath+book+pdf
    • http://files.roscoebarnes.net/uploads/1/3/2/6/132695408/1855382.pdf
    • http://files.rosannavanmierlo.com/uploads/1/3/0/7/130776006/195671.pdf
    • http://files.shopthebluehydrangea.com/uploads/1/3/0/8/130874295/sivevopopeza.pdf
    • http://files.jadeduo.com/uploads/1/3/2/6/132695862/7d88e.pdf
    • http://files.richardwilliamsassociates.com/uploads/1/3/0/7/130775434/1198196.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/70104004422.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/rumutosotizob.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/sql_plsql_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/7431907509.pdf
    • https://cdn.shopify.com/s/files/1/0431/0024/2077/files/konisasalazatemife.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/anova_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/qty_add_to_cart.pdf
    • https://cdn.shopify.com/s/files/1/0447/0764/3545/files/advanced_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/91206894422.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000832e.bin
0c523480876778cd3647ff865552124b3205bffa67320d2026285495cfa259d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832E 5168 bytes
font_01_sfnt_off00009499.bin
f7a84d5dc948fd7dc09a31419261b28d5b5bc3c5e821e2ff6e084947f88243c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9499 4608 bytes
font_02_sfnt_off0000a384.bin
391f1dcf5099f7f09f6340ec080ebaf2de9fd65c7e081779e8dc841e819437ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA384 10096 bytes

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