Malicious PDF — malware analysis report

Static analysis result for SHA-256 684801ea37efea72…

MALICIOUS

PDF

43.8 KB Created: 2020-08-30 03:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 089611049ea5a158f4303ea1b4908131 SHA-1: d76150f75e41d846d6f9bab2790f302a90abbf07 SHA-256: 684801ea37efea72628385b0942c950ae334a6cc7b25d8a5335e32d471d1b9f3
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 URL. This suggests an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness, supporting the presence of a link farm designed to obscure the ultimate destination.

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=ejemplos+de+factibilidad
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ea2f88_8c10f132d71243e194bf91a1af04b929.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_e3b0c8ccdac0450e98f5106d75ea5ce3.pdf
    • https://static.usrfiles.com/ugd/e4ff69_12cf9b2086c04453993f006d903407d6.pdf
    • https://static.usrfiles.com/ugd/a1fb72_5fabb69615264e7693381833503385e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bebec2d79e4a49c6bd4768229736433d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c156cb0b3be843ce97a3e570bb728c2c.pdf
    • https://static.usrfiles.com/ugd/bae363_274b867043f24af189a7fdad957a5346.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d9675f563224ab69ed4d3e2331969bb.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/85622753131.pdf
    • https://cdn.shopify.com/s/files/1/0437/3885/7623/files/ceza_suspus_mp3_indir.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/change_all_your_discord_bots_pfp.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/fallout_4_weapons_on_back.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/mastoiditis_kronis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/73421080125.pdf
    • https://cdn.shopify.com/s/files/1/0440/7063/3624/files/xarifixukiferan.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_off00006b5c.bin
3ba8089160d74bcdededc4ee7e87ca477a77b21b95df2173cead7cfb32fc8bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5C 5380 bytes
font_01_sfnt_off00007d99.bin
58681ded132b9b90127e36c7ee3ea74876e352bd9979b94f7165be7528bc1c01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D99 10968 bytes