Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75a00897e1316e0…

MALICIOUS

PDF

32.6 KB Created: 2020-08-30 04:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f413f4b49eb43c3ccf20d3cf5a92fb46 SHA-1: 86f1d8fd0bc226e39f23b5e0015a85064f5c1a43 SHA-256: d75a00897e1316e0b4cb2ee9f2832c6b735aeaab3f14ec3b91043f4d3b60a53e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=baitulmal+pakistan+form'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, with the first being 'https://static.usrfiles.com/ugd/b8c837_5bc0987d876a49da86f1f0a1c43d0539.pdf'. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to lure users to malicious infrastructure.

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=baitulmal+pakistan+form
    • https://static.usrfiles.com/ugd/b8c837_5bc0987d876a49da86f1f0a1c43d0539.pdf
    • https://static.usrfiles.com/ugd/b8c837_896367473ce44bd59dd3671ef063cd83.pdf
    • https://static.usrfiles.com/ugd/df4650_e27ec99f19b94c788d8c3a727bcc6153.pdf
    • https://static.usrfiles.com/ugd/e3834b_3aa667f16956432a8b83c970d9ba0ee9.pdf
    • https://static.usrfiles.com/ugd/b8c837_36dc028a578e4d4e8fd0fceef4f97e2d.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_c840f7d3f835482682ad68b95317288d.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_6f304de04b414ddbb60d148e32c2659e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4435acaf8f07454098913d9b1539bec5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2fbf2502bc746fe86a3c4dec6c5054f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b2801f4ef954e06afde1a49b0f6e3d3.pdf
    • https://static.usrfiles.com/ugd/469aea_e3830c5cf46b425fab4f7aa55a63acff.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9560fe978a64ad4b5fc856066c55de3.pdf
    • https://static.usrfiles.com/ugd/f1d680_95889db1b18d4e0cbc57d4c45934af1d.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/how_to_renew_photoshop_trial.pdf
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/adagio_baermann.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044bb.bin
4f91bfd66cffe00a35319ac21718ed7b671b9407fd237a44b0e178b6bf944a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x44BB 5160 bytes
font_01_sfnt_off00005636.bin
30bdd7a5c50abca1b2f7f33d18565b9e5ea7360771d1346de09041e797049434
pdf-font-stream PDF embedded font (sfnt) at offset 0x5636 9252 bytes