Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30050dd35c62ddb…

MALICIOUS

PDF

34.9 KB Created: 2020-09-16 18:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38b7d08967a2f80c0ba4747aa8660c8a SHA-1: 521255149a44fc6f9007732a5a316570e2a63300 SHA-256: a30050dd35c62ddbf811c1a8a4ef476d430979b7710c844181e178e536d28126
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious URL is 'https://ttraff.club/wix?keyword=saxon+math+course+2+pdf+drive', which is likely used to lure victims into downloading further malware or engaging in phishing activities. The document body, though heavily obfuscated, contains references to the malicious URL and other Shopify links, suggesting a coordinated effort to distribute malicious content.

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.club/wix?keyword=saxon+math+course+2+pdf+drive
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/11317010463.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2887/files/zagip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/lafozuteligofobiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/kupuvok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/fikinegokanogesefud.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/fukowabew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8717/5588/files/ghost_rider_game_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0460/7085/7892/files/alvida_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/basic_isometric_drawing.pdf
    • https://4cfe1f6f-3fb6-44df-a7a8-ffa9320bdfa4.filesusr.com/ugd/12dc78_d22bb2ed6da645eeb3e9bdfd11c93c87.pdf?index=true
    • https://652de5c0-acff-407f-9ac4-af943cdaca31.filesusr.com/ugd/f65518_13478a8e5db54839b33aa9f1b2755d18.pdf?index=true
    • https://489ecb68-3c25-42ef-a3d8-f8d59a46c19c.filesusr.com/ugd/740d8c_8580a6cd67e648a7b3fe62dbb19770a2.pdf?index=true
    • https://3d3a4c52-6eb8-48da-8813-3b36050d01d5.filesusr.com/ugd/24d943_6f90ef9867e444198bd7d77c8258e289.pdf?index=true
    • https://5cbc90c9-8cbf-452d-bb37-c507391b1b9b.filesusr.com/ugd/01d500_9e2ae032fba241b3b74a580f72d0a749.pdf?index=true
    • https://2d914652-ecd0-47fd-9aaa-a7846f837762.filesusr.com/ugd/405339_ec3632773d2e46589a7f4b0ab064068b.pdf?index=true
    • https://0e9c9eed-7e49-4fb4-859c-dbd0e9d0e639.filesusr.com/ugd/682d1c_00a0d88e64a3454088ac11453e9f4ce2.pdf?index=true
    • 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_off00004921.bin
e29817f2347afbe2d0f0dffb44784bf923c145af27be49787db18588c3e41bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4921 5728 bytes
font_01_sfnt_off00005c86.bin
0d9dca5fdede9797bf341890f0556cfa66f54ff064ba4c463ce518735c852983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C86 10104 bytes

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