Malicious PDF — malware analysis report

Static analysis result for SHA-256 061480d361fde177…

MALICIOUS

PDF

55.8 KB Created: 2020-08-02 08:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca995e0de538b5c2684338793d335cc7 SHA-1: 7a921137a1ba15bbf72cbed2a75a7407a253811c SHA-256: 061480d361fde1770a632b3df3f0a4e45f3dac59ab3053be1eb8dec4ceee8569
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that appears to be part of a lure to disguise the malicious intent. 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=scientific+calculator+ti+84+online
    • http://files.beaverstatedental.com/uploads/1/3/1/8/131857041/lumuzewavoxoru.pdf
    • http://files.qualityfolkdojo.com/uploads/1/3/0/7/130738801/puditedigode-darilusikewini-silimevo.pdf
    • http://files.hammanrealestate.net/uploads/1/3/0/7/130775475/9097102.pdf
    • http://files.jancancan.com/uploads/1/3/1/4/131406413/sosazidisajawaj-ledosol-vaxodavuv-ziwobedomanefon.pdf
    • http://files.grignonmansion.org/uploads/1/3/0/7/130740163/dazaxunumofegijaxoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/bufejisoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/vorebimiboruwag.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/vaxitekumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/14399537919.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/pizenifigiforarudabokiju.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/kepewewoje.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/mastech_digital_h1b.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/htaccess_for_kohana.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/cutnell_and_johnson_physics_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/fasemamujud.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/movuzovikugiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/sekiro_mask_fragment_left.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e5d.bin
4dbbc5e29f866435d9b5e6aa0b1f68ad675054492c1d634005730b65ef1e01d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 4964 bytes
font_01_sfnt_off00009f46.bin
e8e3b25b6afd7ef71d103d4e8011e8a6a60707d2bbcca069590a5c50aad3986e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F46 10812 bytes
font_02_sfnt_off0000c437.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC437 4324 bytes

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