Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eec3b216a50831c…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 12:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f00ee37ad96813f3209f8b55ab51c6 SHA-1: 4c91e95c2175460a3cfc3545f75441873d1a9b14 SHA-256: 6eec3b216a50831c749cd730edc7c56a83f84b117309015a3ba90c8a927dec59
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=codominance+worksheet+key, is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains references to the worksheet key lure and the malicious URL, indicating an attempt to trick users into clicking the link. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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.cc/pify?keyword=codominance+worksheet+key
    • http://posik.lawpoa.com/uploads/1/3/2/6/132683071/vulelazon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/jabisiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5275/2283/files/gomorewofir.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/45975931436.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/agents_of_shield_season_1_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/58588050734.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/l_a_w_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/3813/7755/files/dinetuwuvelupul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/5268588261.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/kaxonezu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/zugigevelafenevepifal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/dusofivib.pdf
    • https://cdn.shopify.com/s/files/1/0450/2867/1646/files/kenichi_ohmae_borderless_world.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc8.bin
982f9cf65eaf88d717ebbba68671ac09cab3c5dcc6b080ca33ed424f402e9cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC8 5216 bytes
font_01_sfnt_off00006d6d.bin
f31381d0aa91863c5ece879266bbd62b6f0bbd665d82d4695416b7b98d6462dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 10136 bytes
font_02_sfnt_off0000902f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x902F 4324 bytes

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