Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5aed3abb736c06…

MALICIOUS

PDF

43.2 KB Created: 2020-08-05 05:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3020594c355e0e643bc912f778f176d7 SHA-1: 85707abf7fc80d86780fe40751f98286f8304a4c SHA-256: 4d5aed3abb736c06903bdff17ae41fa9b8875432001354898e6e82b2f101b335
152 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though partially corrupted, suggests a lure related to 'java programming for beginners pdf'. The presence of a link farm and a critical heuristic firing for malicious redirectors strongly indicates a phishing or redirection attack. No scripts were extracted from this sample.

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=tutorial+on+java+programming+for+beginners+pdf
    • http://files.shadysideofthetracks.com/uploads/1/3/2/7/132740685/zitagawomepulakope.pdf
    • http://files.gypsybootsandcutter.com/uploads/1/3/1/6/131606550/1470967.pdf
    • http://files.usatoyfactoryaustin.com/uploads/1/3/1/6/131637021/xemurunopivudadukix.pdf
    • http://files.canaanchristianministries.com/uploads/1/3/2/6/132683154/jomojodetov_diludiwol_peduboxijipiseg.pdf
    • http://files.kasr.ca/uploads/1/3/1/4/131453682/5211588.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/75715012469.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/55334550024.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/90179125845.pdf
    • https://cdn.shopify.com/s/files/1/0441/4462/3768/files/37611795024.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0391/files/wafexasawotazam.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/fesudoxukupamen.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/vanudamawitarobogenafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/68983796858.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/wood_fired_pizza_oven_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/4152338324.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a40.bin
c14f7e1bc58fe4dcfc87e7cc0ac67088fc4d08185154c9682c49dbc5502c6136
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A40 5588 bytes
font_01_sfnt_off00007d2e.bin
c236b2b19c008a909ff34ac257843da1b8f12c6262cb9432157d5e4744444991
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2E 10024 bytes