Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc9ce2960618bfe…

MALICIOUS

PDF

49.4 KB Created: 2020-08-17 02:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8be3aab03e683a88430b3179627c76c SHA-1: 77505e253ff0f10dcacb1151738a2a9efccd458f SHA-256: 5dc9ce2960618bfec76d33cfce0525b357b72fafd88e71954b180ddfca394243
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to benign Shopify URLs, but one critical link redirects to `ttraff.com`, identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure users into clicking it. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt.

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=buku+belajar+bahasa+jepang+pdf
    • http://files.koolkidzbitz.com.au/uploads/1/3/1/1/131163738/wupare.pdf
    • http://files.readyforsuccesskits.com/uploads/1/3/0/7/130739783/2860722.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5513/5390/files/cambridge_pet_for_schools_2.pdf
    • https://cdn.shopify.com/s/files/1/0453/8610/5000/files/99763399553.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/acg_clinical_guideline_alcoholic_liver_disease.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/monophthong_and_diphthong.pdf
    • https://cdn.shopify.com/s/files/1/0437/6287/6565/files/lametibopemufoloxebilev.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/58931030336.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/rabupopixefawoje.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/zatimefawebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/daraz_app_free_for_pc.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007779.bin
497a712fb9c429fe09344df855023082e83b5f312acc8e7d1c6fce013ef33707
pdf-font-stream PDF embedded font (sfnt) at offset 0x7779 3076 bytes
font_01_sfnt_off00008273.bin
1bac8faed3fc7cf4f85bca7e509d81b2dd42208ba8637ddc22355efd87c9d890
pdf-font-stream PDF embedded font (sfnt) at offset 0x8273 5632 bytes
font_02_sfnt_off00009594.bin
c983b31cdc25a307e3ffc104ad77f33d3d401cbe28182bbeaf531b8845380aa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9594 10156 bytes