Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06c65e50be86dc0…

MALICIOUS

PDF

37.9 KB Created: 2020-08-19 01:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea51316f90dbf2c585c7b02a32564e30 SHA-1: 9448a9a4af3f229cc70aae559e9fbc2a8e22665a SHA-256: f06c65e50be86dc01d57f1ce964ba6dccd4060ef565561fe4e09e3045f0e790b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=biostatistics+for+public+health+book+pdf', suggesting a lure to download a book. This link likely leads to further malicious content or phishing pages. The presence of multiple Shopify links, while some are benign, is characteristic of SEO link farm techniques used to obscure 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.cc/pify?keyword=biostatistics+for+public+health+book+pdf
    • http://files.hazelrosegibson.com/uploads/1/3/1/6/131606325/lewazosuzepodawud.pdf
    • http://pitosepu.flatrivermassage.com/uploads/1/3/0/7/130775413/9942446.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/avm_vs_cavernous_malformation.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/60712865378.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/panasonic_wall_fan_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/raguwove.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/mefozedazibom.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/ginageroguk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/tofuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5121/files/9017202512.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/mekemovurejotogop.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_off000049e2.bin
a1d62b5c2674f2e3fbc475010a6474a850eb6ec61302ce449b1cbfeb84710af6
pdf-font-stream PDF embedded font (sfnt) at offset 0x49E2 5272 bytes
font_01_sfnt_off00005bd3.bin
db45c010b1f0697844457807ac1f1d43f978584d82fc9961ef08cb228928fbd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 9660 bytes
font_02_sfnt_off00007cde.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 4324 bytes