Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7bb3f8e13ce5f9…

MALICIOUS

PDF

37.8 KB Created: 2020-08-15 18:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f36227c3e16bb74c40b7f0936540215 SHA-1: c142ddab161d7b3394524da0a016a7c34e6b7594 SHA-256: 7e7bb3f8e13ce5f988152ab69a3c33dfd65217b18d95c8f93e1fdb4f65036f8b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be redirecting the user to a malicious site via a deceptive link.

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/wb?keyword=auditing%20arens%20pdf%20bahasa%20indonesia
    • http://files.littlehorsevintage.com/uploads/1/3/0/7/130739850/a75131b5d.pdf
    • http://files.orchardheightsonthefox.com/uploads/1/3/0/7/130776655/3c13a44ea.pdf
    • http://limor.twfd46ny.com/uploads/1/3/0/8/130874674/ruxosirulevakan.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/guxizuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/ladabinumot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/34184440201.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/one_variable_linear_equations_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/segmentation_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/gazowedofixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/2872452259.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/50443410667.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/academic_writing_english_alice_oshima.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9637/files/bitlife_ribbons_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/fakomosod.pdf
    • https://cdn.shopify.com/s/files/1/0428/6837/5719/files/zifipirirozipigeludeniviz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f7.bin
e7b2e0210f48fc8296df61cac4513d874a986cfb3188282bb969a4785a838935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49F7 5284 bytes
font_01_sfnt_off00005bd4.bin
ebf5f0d606b94e2f4fb6394e4ce329c28de8395c1840c75bf9f7f7a4ad4e2440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 9440 bytes
font_02_sfnt_off00007bf7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF7 4324 bytes

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