Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7fbb4b64fcb842…

MALICIOUS

PDF

33.5 KB Created: 2020-08-18 20:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cb0753de2063f4deb90df73f3c7bf79 SHA-1: 082b675d2f1251681287d52f0d9628e0d98835be SHA-256: 5c7fbb4b64fcb842d660768836f1c6b1628b09b57c7e7445957570f7cabdc19f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/pify?keyword=manual+bath+bomb+press+machine. The presence of numerous links suggests an attempt to manipulate search engine rankings or to phish users by directing them to potentially harmful websites. No scripts were extracted from this sample.

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=manual+bath+bomb+press+machine
    • http://files.worldwarc.ca/uploads/1/3/0/8/130815095/xokevogetuwa.pdf
    • http://files.sietinternational.com/uploads/1/3/1/0/131069789/5e7f39f98507d4b.pdf
    • http://files.moonhawkvisions.com/uploads/1/3/1/4/131437636/7970345.pdf
    • http://files.skintwalletsusa.com/uploads/1/3/0/9/130969695/jafubanurolapa_gamoporebi.pdf
    • http://files.chickswithdecks.co.uk/uploads/1/3/2/6/132682819/dadedalofojurefof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/mewufes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7142/3135/files/craft_beer_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/zaxuwakab.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/10438127842.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/barisan_dan_deret_geometri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/46365448161.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/2303112813.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/592626504.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/31458372546.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/56210784347.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/outback_nutrition_information.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_off00004572.bin
e95e6b4a0715da3be2fc1fc90ddafffc07d3f387b3e6f5db6d3649c397e16eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4572 5316 bytes
font_01_sfnt_off00005754.bin
3c017638bc52fbc44028481f9343cb773efd708929e53ff2cbe17db2b5e289e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5754 9944 bytes

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