Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc204603cd0b99b…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 09:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc3e038c876eb55ff231a7869307283 SHA-1: 5c67d0dac75cde7178a465356b9ed36b0f45d070 SHA-256: 0cc204603cd0b99b0c3015f2156bc51d5f92b78fe3c32707a8e8054b54415c4a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to host phishing content. One of the primary links directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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.me/wix?keyword=biorad+dc+protein+assay
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/topographic_map_worksheet_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/5706/7685/files/tuwemogodopobep.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/libibijoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6917/files/viwupaduluvivijabub.pdf
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/definite_and_indefinite_articles_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/jamuxewij.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/21144477214.pdf
    • https://static.usrfiles.com/ugd/5438e3_b27f507a273b4a948ceb68917c547bbd.pdf
    • https://static.usrfiles.com/ugd/eed56f_8f1e229455da40349955cd3e7030637a.pdf
    • https://static.usrfiles.com/ugd/4d400c_48d0d81e6ba349fb8cc98fac0b1cabeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a34f25398c34df9b1a99cc4e235aec6.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_b3a0d1d9499f432ebed28f2c1964d304.pdf
    • https://static.usrfiles.com/ugd/de60da_b79b64dc2c5a4eb49b6e1a7b83c43d34.pdf
    • https://static.usrfiles.com/ugd/b8c837_9640a64df9af446fa944510dea9e17fd.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_off00005f1b.bin
e8d2df19d8d5b46954d3bc153f2c2eac9d5832f2cc099212d3b288e949065f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 4972 bytes
font_01_sfnt_off0000700a.bin
60a35867783a3f1fabbb688b3dd07da83388c1bf9e7437cdc16942a9c91fcc1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700A 10612 bytes
font_02_sfnt_off00009407.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9407 4324 bytes

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