Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0b01174aba4624…

MALICIOUS

PDF

47.9 KB Created: 2020-09-09 01:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3622d5823f1d88223d134f496ef24d0d SHA-1: c5d16bf57398a6193e92e5044a7b41070fef3bef SHA-256: 1a0b01174aba462473120080acfb208d49118a20b9971a73dc509b508852345d
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://ttraff.me/wix?keyword=mandatory+reporting+requirements+nt, is identified as a malicious redirector. The document body contains obfuscated text and multiple URLs, reinforcing the malicious intent.

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=mandatory+reporting+requirements+nt
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/61992690793.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/conflict_minerals_disclosure_and_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/7713/1683/files/obat_bisul.pdf
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/don_t_starve_food_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0715/6128/files/longman_dictionary_free_download_ful.pdf
    • https://static.usrfiles.com/ugd/77eba6_2e7ee3b1bc5e4c9db8316cb6df80af4b.pdf
    • https://static.usrfiles.com/ugd/2813e2_5927cb5c69af4535871b695d158f67e3.pdf
    • https://static.usrfiles.com/ugd/99a8f2_023f4d5f335a4fd7b4be721b0b5a3091.pdf
    • https://static.usrfiles.com/ugd/fef806_2583a13074834244b2967e2157c05db8.pdf
    • https://static.usrfiles.com/ugd/b8c837_59da4d82b3f7489ba22734dd22dd03bd.pdf
    • https://static.usrfiles.com/ugd/f80014_8a2456d7ce844580b5c67cefd15d0c4e.pdf
    • https://static.usrfiles.com/ugd/9f2514_a87039b9c65a4bfcb3b01f5cf6bae262.pdf
    • https://static.usrfiles.com/ugd/374ce0_a01ab582b9c64d12b05588e06e7ad82b.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_535332106cf941d0af1dd93d7b6dad02.pdf
    • https://static.usrfiles.com/ugd/98857b_03d533a6e57b4204b6e740f9bc00648d.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_off00007d71.bin
f4a207cbfec609f4242fb0dc611f039ad01db15e0b83c5edb5a23af1b001e767
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D71 5480 bytes
font_01_sfnt_off0000900c.bin
5d2280594a41e3ac1895ff6e9791bcf36e4cb2fd14b679d304332397bdf4dbc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x900C 10324 bytes