Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3705bae01ac88e8…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 03:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9e2a365087b85dde18cd43950b6331c SHA-1: f07a5b32478d79220ca6c82819924619c85bba79 SHA-256: b3705bae01ac88e86349594bbb6215bb985e9d2338b1c759e3bbc36ad4e91537
142 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that suggests a lure, potentially for a callback phishing or tech-support scam. The presence of a link farm further indicates malicious intent to distribute content or redirect users. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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.cc/wb?keyword=nafsa%20manual%202015
    • http://files.robinfarmer.com/uploads/1/3/1/3/131380627/78c412e7.pdf
    • http://wenore.laroccamiahouse.com/uploads/1/3/0/8/130874601/xubivowatove.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/rokubed.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/linulepepevogudaxebuwus.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/49547870916.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/44267281498.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/41954582694.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/10207649289.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/conduct_disorder_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/malaguena_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/tavukifaduxakafaxesarujix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/karamoxuvavib.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_off00005883.bin
77892cb4b5b5fe6280f42af6706a3a4bcadb1d78923f4a060db1b79c8ba3e878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5883 5236 bytes
font_01_sfnt_off00006a4e.bin
145fdbff0ea45dbb3c453f4d61801b16334a97cf0ffe2bc3bebb6156c4a485d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 11144 bytes

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