Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf478c4ba02ea3bd…

MALICIOUS

PDF

46.5 KB Created: 2020-08-24 02:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec099baea1e863b9f8a25389ddec7644 SHA-1: 65d910abb5b33185c92d8c4a4437f64310fabb63 SHA-256: cf478c4ba02ea3bd93538adc9cb0906716c13b8e1d180b78dea1d6d874598b6e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary attack vector appears to be luring users to a malicious site via a deceptive link within the PDF.

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.com/pify?keyword=cheppave+chirugali+audio+songs++coming
    • http://fujibagik.ensophysicaltheatre.com/uploads/1/3/0/7/130776791/7943537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/complementary_proteins.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/dirak.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/40969835719.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/migoxanegetotar.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/weluniwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0269/files/jurnal_blanching.pdf
    • https://cdn.shopify.com/s/files/1/0433/6910/3528/files/74980437450.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/67464546222.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0490/files/47598079335.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/water_pollution_essay_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/tewedupisuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/kajetadaj.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_off00005e29.bin
c44d72985711d0b7efb826afdc8cdde89fde039d55f3c366cc82bd34fb9d372d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 5452 bytes
font_01_sfnt_off0000708c.bin
5468598de8cbb54cbe2b58fa7620876c32bcb58155d956d8d48620035e0839b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 3264 bytes
font_02_sfnt_off00007d9f.bin
202c125ed03e238ab83e4a8f32b8fd98bca35505dd73e3cbd29933eacaaaabcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9F 15424 bytes