Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1bd9d1a5a68512…

MALICIOUS

PDF

46.3 KB Created: 2020-09-02 07:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d2d8ae12d53b8ddd9f80dab1ccd8cca SHA-1: d201d16f3c8f88917408cf1eb7e7b3dd93d4d2c7 SHA-256: bd1bd9d1a5a685129f6929c49d47962538016d64fc6414fd10e5b53f1db848d7
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=worksheet+on+simile+metaphor+personification+hyperbole'. This URL is presented within the document body, disguised as a worksheet title, indicating a social engineering lure. The PDF also contains a large number of external links, many of which point to 'static.usrfiles.com', suggesting a link farm or redirection strategy. No scripts were extracted from this sample.

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.club/wix?keyword=worksheet+on+simile+metaphor+personification+hyperbole
    • https://static.usrfiles.com/ugd/764aaa_3e172ed56a184ba9a0fa97564247afea.pdf
    • https://static.usrfiles.com/ugd/822ecd_f42e630f8a374463a791ac3f16664e7b.pdf
    • https://static.usrfiles.com/ugd/c5d40f_609846137e9e4a379ef78ec9a602a98a.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_3cbec39ef14144ecbe2f74f3ffa453bc.pdf
    • https://static.usrfiles.com/ugd/3cb679_7c04e8afc47c4da28f93430d3c83ba5b.pdf
    • https://static.usrfiles.com/ugd/e1c37d_0ca7b387a5564a02a0ed753231e0dd84.pdf
    • https://static.usrfiles.com/ugd/07625c_dbaab19811a54b3bbf9f262b82315d37.pdf
    • https://static.usrfiles.com/ugd/bdc04d_a9855777bfab49caa74b52789e350858.pdf
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/viper_squad_minecraft_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0876/8675/files/20630957986.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/zerulosubolinozu.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006990.bin
a2133c6a6fd06c1d32a44e9c71dac53aee2158705b18716471a5c5b6742eeb8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6990 5364 bytes
font_01_sfnt_off00007baf.bin
843f505fd4c18ca7ebdae7549e3ad8322681f9f30fcd5a6f1d1459e196e4e575
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAF 10040 bytes
font_02_sfnt_off00009dfe.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFE 4324 bytes