Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8ea7cada7246bf…

MALICIOUS

PDF

35.6 KB Created: 2020-08-05 15:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e09786056090aeeeb3f26b851e7c878d SHA-1: ccc5f7e4c7aabfab84e05651678aebbd4eb634c6 SHA-256: eb8ea7cada7246bf008dcd29f4601506e92a06f92f9af0c93b55c49c364ba9bd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDF files, indicating a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which further suggests malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body itself is largely unreadable binary data, but the presence of the malicious redirector URL and the link farm structure are strong indicators of an attempt to distribute malicious content or manipulate search results.

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=fundamentos+fisico+quimica+castellan+pdf
    • http://files.indiakonnekt.com/uploads/1/3/0/8/130874422/kajinojakog.pdf
    • http://files.paramountia.com/uploads/1/3/1/6/131637385/8026294.pdf
    • http://files.europehousearuba.org/uploads/1/3/1/4/131438069/karuzokazipavemu.pdf
    • http://files.trilococoaching.com/uploads/1/3/1/1/131163617/9273c5fd.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/luvezomatof.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/55779599391.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/razemagoberiwuse.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/9924208990.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/68593084503.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/pelajebakuditamixogivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/50604628783.pdf
    • https://cdn.shopify.com/s/files/1/0436/7391/1449/files/2008_dodge_avenger_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/14281664687.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/21367785340.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/probability_theory_and_mathematical_statistics_marek_fisz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/71116237449.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/16427234719.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/wrapper_classes_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/bluebook_19th_edition.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/
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d5d.bin
2025e9e0cba065df9714342b4434c63ca694f32748fb9e6072517633e086a73b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5D 5284 bytes
font_01_sfnt_off00005f50.bin
3833b3ea5e55fa21db0c3ea9ccbfc805b867d1bff756d31f69c8c1fb8ceebe7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 10036 bytes

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