Malicious PDF — malware analysis report

Static analysis result for SHA-256 276acc2b01e62a77…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 01:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 330ba1607b1dcdb7e4202347e633e30f SHA-1: 427701b0e6e3d79384d4ffe8a1ad969470700224 SHA-256: 276acc2b01e62a77401a6c455ea443ab9b903ae952e179c79714c60f89d737bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=banda+banda+megharaja+song+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and references to song downloads, reinforcing the lure.

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.com/pify?keyword=banda+banda+megharaja+song+free
    • http://besamuw.kimberlifreilinger.com/uploads/1/3/1/1/131164496/6181648.pdf
    • http://files.haccc.org/uploads/1/3/2/7/132712207/taxujunetabar-fofogume-ravigadotoke-zarud.pdf
    • http://files.justbeau.studio/uploads/1/3/0/8/130874254/4103156.pdf
    • http://varugapin.bustemupoutfitters.com/uploads/1/3/1/1/131163658/tajir-guxewufisotab.pdf
    • http://files.rjupmarketpress.com/uploads/1/3/1/3/131383681/1722401.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/kofiridevaxomezumewopez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/gepukezate.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/49547870916.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/wojoni.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/kubipabivewevexo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/biwesil.pdf
    • https://cdn.shopify.com/s/files/1/0437/1673/9222/files/jazz_blues_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/question_tags_for_imperative_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/dorebuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/mimugajurifizabemak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/amplitude_modulation_using_matlab.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_off00006583.bin
1f80b47f409b92f57a7d75fd35f74ebf34e6125a56a275b81912f616e9be636f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6583 5556 bytes
font_01_sfnt_off0000783e.bin
68c63db1dfe77d1e75ef01f9fe93f0a5992f689e905f02e9f14a4f616d4bd7c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 10288 bytes

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