Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74be37a2612af23…

MALICIOUS

PDF

40.7 KB Created: 2020-08-24 17:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13f550139df9b5a8184b71d5159cd9f4 SHA-1: 47817055b061c923c1bb0f9ec3c2bfc0964847f2 SHA-256: a74be37a2612af23ec8c0f98ddafca7d6f0759d4f6c487885d65788c08462de1
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=insidious+chapter+3+imdb+parents+guide. While the document body contains text related to 'Insidious chapter 3 imdb parents guide', this appears to be a lure to disguise the malicious intent of the embedded links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=insidious+chapter+3+imdb+parents+guide
    • http://files.michelepowles.com/uploads/1/3/2/7/132712661/16bed5e2a3ee0fd.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0782/files/brian_may_red_special_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/mobujomabatejuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/5401408128.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2053/files/genie_garage_door_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pozopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/interior_design_course_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/0046/9403/files/9836900402.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_off00005fe3.bin
b05a0a510491c74ca96c5f5964b8f113aa6036cf3858138e2789253caccc8324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE3 5696 bytes
font_01_sfnt_off00007305.bin
94121cd0aa82d734206227c0798825c21aece7a6457681a7d5c91c77f0094391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7305 10520 bytes

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