Malicious PDF — malware analysis report

Static analysis result for SHA-256 faac0d08b2142edb…

MALICIOUS

PDF

41.8 KB Created: 2020-09-02 02:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7d0e23f3f2f2ee7f31140b5d72437c SHA-1: af585051242206db333af14cd410839a0571e530 SHA-256: faac0d08b2142edbbaf7727541f562ad1f3df879f7f3ac693152f330ea186722
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a direct link to a redirector URL, indicating a social engineering attempt to lead the user to malicious content. The ML classifier strongly flagged this PDF as malicious. The presence of multiple links, including one to `ttraff.cc`, suggests a phishing or scam attempt disguised as a search result for an academic paper.

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/wix?keyword=ernst+cassirer+language+and+myth+pdf
    • https://static.usrfiles.com/ugd/c20ea7_32b0f992ff1945ee88e8299c53f66954.pdf
    • https://static.usrfiles.com/ugd/0047a4_cc65ce3ee32a43cd9e356b5dc2cc1745.pdf
    • https://static.usrfiles.com/ugd/b8c837_c09e7d27cbe64f96aee667eca0fce3a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_953e6decbe2a445cbfe6efe51b00db57.pdf
    • https://static.usrfiles.com/ugd/fbccce_e5169c97b95e4e0e9f597e81563fb6a2.pdf
    • https://static.usrfiles.com/ugd/c8a981_f08370b5b4f748da9d8833aad1ed6157.pdf
    • https://static.usrfiles.com/ugd/d01287_24911c904fae49b286cee413a2f6aa38.pdf
    • https://static.usrfiles.com/ugd/286fb8_93dbb6a32e3a44ab9c8dfc5d1c5d462e.pdf
    • https://static.usrfiles.com/ugd/bca722_589c0ae787ba4af697aa23a507ac5768.pdf
    • https://static.usrfiles.com/ugd/6908d7_1dc65df5383c4434adf679abea21073f.pdf
    • https://static.usrfiles.com/ugd/e2c250_c7fe3361c9024fdd9cb5194b4e83ccb3.pdf
    • https://static.usrfiles.com/ugd/6d59ab_4ad6051e599c41cba0ee5dc698d55932.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/dosewonojuzag.pdf
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/73521474330.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/area_compound_shapes_worksheet_answe.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/
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/area_c

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000647f.bin
b8a13462d218d5e0244244bdefc1dc7b005d3423b3027a3cb6d3db98e5cc8845
pdf-font-stream PDF embedded font (sfnt) at offset 0x647F 5628 bytes
font_01_sfnt_off00007785.bin
b4567e72941c4fcb84783903aa962fb248433f78e768ae84c89cd2d94c5acee8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7785 9952 bytes