Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd58072660d2c5c4…

MALICIOUS

PDF

52.5 KB Created: 2020-08-06 17:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf18cf8dd1807a10fee0fe716db49c45 SHA-1: 0491dbe3d2b45f122865517cc1189acf67ba5364 SHA-256: bd58072660d2c5c49d543bb027d03c354bbd73b036baccb65dd17c528bf9f4f5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.cc`. The document body appears to be corrupted or obfuscated, but the presence of numerous links and the malicious redirector strongly suggest a phishing or scam attempt designed to lead users to malicious sites.

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/pify?keyword=t%25E1%25BA%25A3i+file+pdf+v%25E1%25BB%2581+kh%25C3%25B4ng+m%25E1%25BB%259F+%25C4%2591%25C6%25B0%25E1%25BB%25A3c
    • http://files.stjohntheevangelistcarrollton.com/uploads/1/3/1/3/131398332/3509583.pdf
    • http://files.livingsoulplete.com/uploads/1/3/1/3/131381464/pozukepun-fewapunafijaba-bifuvewadotolik-vuvozeja.pdf
    • http://files.unknowngeniuses.com/uploads/1/3/2/6/132696604/4590500.pdf
    • http://files.uhbauerwomensociety.com/uploads/1/3/1/6/131637240/vexifukumite.pdf
    • http://files.coachscottschemistry.com/uploads/1/3/1/6/131637271/xanogoluzovad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/majusotogozarow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/salujonavafitavizu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/siwagufaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/70470358191.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/64690261689.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/reader_extended.pdf
    • https://cdn.shopify.com/s/files/1/0438/4843/3829/files/addition_of_dissimilar_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/rujevirakezejupuja.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/55785323479.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/3410/7286/files/moburerinisetogolevitalok.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/1/0434/7055/3250/files/557

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689a.bin
e6076dddc9c8d16d196f134a3223a1dcdf1dcfbe09ec3e22de51233b3b344014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689A 6376 bytes
font_01_sfnt_off00007d02.bin
37311899e092bfae155878b6d536c7514b6d919edc56355f6fdaf119c6c2f027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 22328 bytes
font_02_sfnt_off0000ac9b.bin
c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9B 16376 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.