Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce33628ba456f2e…

MALICIOUS

PDF

54.1 KB Created: 2020-08-08 07:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b53075551f8ba4806c2449ebe7c0f2a SHA-1: 7d12699c26dfce260f0a8af4482541cc65055f4e SHA-256: 1ce33628ba456f2e62a632c5ba6c6c6d116c18101343f2439fd82aefc49443f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains text related to 'Bhagavad gita chapter 17 pdf' and the wkhtmltopdf tool, suggesting a lure to download content. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful site, likely for further exploitation or credential harvesting.

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=bhagavad+gita+chapter+17+pdf
    • http://files.elcatoday.com/uploads/1/3/0/9/130969472/3556013.pdf
    • http://files.startingpoint.info/uploads/1/3/1/3/131380345/6809996.pdf
    • http://files.realtorblogging101.com/uploads/1/3/1/0/131069906/4ae360c3.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/college_physics_serway_9th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/mudilemuwun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/28994599196.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/search_doc_on_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0429/5445/7254/files/dukizowuvofog.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/80894968261.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/68101542217.pdf
    • https://cdn.shopify.com/s/files/1/0437/2214/5943/files/88435053726.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/85324535946.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/bibiliya_ntagatifu_mu_kinyarwanda.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/12399092156.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/publication_of_smiles_rearrangement.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_off00009660.bin
ecb8c786d20a51a0ae2dc7c7006b2b021e31ff3a6e4917e2c58f15eb5c605aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9660 5448 bytes
font_01_sfnt_off0000a905.bin
57dc2826795ee92e86cd7cb257d697ffa1f0c1972e64ec55f26a4ea8883b246f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA905 10120 bytes