Malicious PDF — malware analysis report

Static analysis result for SHA-256 02309408ced972fb…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 03:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0937eceb33d1175d41c1fc48d322c0d2 SHA-1: 73d62f53d7b31d491e7fd8c9fb1510bb307c17fe SHA-256: 02309408ced972fbd6af5f9c18e19b66437645f1bd2ca2d709ec626d4e45093e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests the document is designed to funnel users to malicious infrastructure, likely for further exploitation or phishing. 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=oster+bread+machine+recipes+pdf
    • http://files.worldginsengherb.org/uploads/1/3/1/3/131398093/8b506e42.pdf
    • http://files.mesquitegators.com/uploads/1/3/1/3/131382030/rusefuzoluweni_purexevarokexo_sosub_rufusadenot.pdf
    • http://files.100menwhocarequinte.com/uploads/1/3/2/3/132303229/pamazitiwojomev-joxudezivoki-pujupunatad-katizonopeful.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/20586056624.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/52406140049.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/jaxesapaniripakut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/1889521433.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9078/files/bp_344_accessibility_law_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/16482071577.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/vunosaxima.pdf
    • https://cdn.shopify.com/s/files/1/0437/4783/6065/files/42219182252.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/bear_den_leader_guide_2020.pdf
    • https://cdn.shopify.com/s/files/1/0447/5689/3847/files/frostbite_engine_sdk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/jatirawebefanafe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/bamujukiruvem.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/distortion_in_rf_power_amplifiers.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/94588011652.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/96618681808.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec4.bin
67b122023de80b631228ecc033b734f1c347baa70242ce5f4d55d3f1f3ddc8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC4 5532 bytes
font_01_sfnt_off0000815f.bin
3993e8a91e70ae49a6482ee7892a191c19be88946c98844422a2e051f7466bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 10920 bytes

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