Malicious PDF — malware analysis report

Static analysis result for SHA-256 232271fb679618c8…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 02:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf0883b7a84156cb766d6b3e10c4c419 SHA-1: 88b14ab9bfc8059faa5ecf08ffaf96457a1d0a86 SHA-256: 232271fb679618c857d56c4b20a5c22a898e925716a6345dac7a20516fd6af35
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=banned+books+of+the+bible+pdf'. The document body and embedded links suggest a lure to download further malicious content, likely exploiting the user's interest in the provided topic. The ML classifier also strongly indicated maliciousness.

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=banned+books+of+the+bible+pdf
    • http://gotetem.secondwind.org/uploads/1/3/2/6/132695375/3d28e5096ff639.pdf
    • http://fuzesug.trinityastrology.com/uploads/1/3/1/4/131437421/c626c456013d74.pdf
    • http://wojuv.petervermeersch.net/uploads/1/3/2/7/132741099/25e68c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/43997790842.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/wakusopimitigetifisofi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/siwuvotibokukaliwila.pdf
    • https://cdn.shopify.com/s/files/1/0439/5512/6430/files/customary_law_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/kiruxeluvepumuli.pdf
    • https://cdn.shopify.com/s/files/1/0433/1359/4526/files/vamexigifukuxosik.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/dorajavelazedodokadolelim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/lutalaxebasopopamifiliv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3669/files/latex_side_by_side_figures.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.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_off00007528.bin
a94f0d02e47def4770129e3468fd33d98f11135b8d0dd03e14aac9c758673321
pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 5284 bytes
font_01_sfnt_off0000871f.bin
c07735203a15a366ca8382b319f92e71ddd96697a888d8602874156a11a7b6b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x871F 10288 bytes