Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a30301666dd658…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 03:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06483f5ca1cc1e39dc24dd3bb540acb4 SHA-1: 064b04e32376adf7118cd9949430c6e2c043359a SHA-256: 75a30301666dd6581065e7dd38a206568f261edf04a181fe9c505562b41725ba
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 a redirector infrastructure. The primary malicious URL, 'https://ttraff.com/wix?keyword=prelude+to+programming+6th+edition+c', is designed to mimic a search result for a programming book, likely to trick users into clicking it. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content broadly.

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.com/wix?keyword=prelude+to+programming+6th+edition+c
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e3325f_1c49901ddea64b759b10be97a01a4553.pdf
    • https://static.usrfiles.com/ugd/7198c1_777a89e4207f45e998a7f830486c9ba2.pdf
    • https://static.usrfiles.com/ugd/b8c837_955193f177cb47a8b3e45262bbd0bbda.pdf
    • https://static.usrfiles.com/ugd/51c472_249f94bab0c04429bb8dc2c0880ce62c.pdf
    • https://cdn.shopify.com/s/files/1/0435/4660/7765/files/1022567957.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/25578430688.pdf
    • https://static.usrfiles.com/ugd/20d83a_1ff3583c23b14af0a00f7d403236f78f.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_ab82fcab13524d76bb7979a91c9dbe02.pdf
    • https://static.usrfiles.com/ugd/e6092c_291bc4c362b74d78a4a06d3602515ad5.pdf
    • https://static.usrfiles.com/ugd/4b68be_0a6f7d048d9b4f77972bc9765420a733.pdf
    • https://cdn.shopify.com/s/files/1/0429/9420/4825/files/2631037953.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/pewosewonifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/cracked_google_store_apk.pdf
    • https://cdn.shopify.com/s/files/1/0440/8298/7158/files/cessna_172_instrument_panel_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/luniwawifonevefefutikona.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bf.bin
5fc7d73dc6da543793284b9cea99c3bf88aeb61ee9faceb25844904030ea9e9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 5464 bytes
font_01_sfnt_off00007b20.bin
854dffd75c91fdd09354e83a52233548185109600721a52bc08268c0583cb65b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 10524 bytes