Malicious PDF — malware analysis report

Static analysis result for SHA-256 860fd9259c66b88a…

MALICIOUS

PDF

52.2 KB Created: 2020-08-07 23:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2970d0d848729432159e02b68be49ac8 SHA-1: bac369bfda0199d4a6266380822a330e7b69fdd7 SHA-256: 860fd9259c66b88a6ca2ed8521d5d1a3e965176c2150d48168d7758075c9df99
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous links, many of which point to a redirector known for malicious activity. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This indicates an attempt to lead users to malicious sites under the guise of providing a document.

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.ru/pify?keyword=teachers+day+speech+in+tamil+pdf
    • http://files.verdancecreations.com/uploads/1/3/0/7/130776575/kibunux-fevizu-xutajoxisij-makoz.pdf
    • http://files.minimountainstudio.com/uploads/1/3/2/7/132712099/timage.pdf
    • http://files.modelplanmedia.com/uploads/1/3/2/6/132682833/timavojinelaj.pdf
    • http://files.sanikadeshpande.us/uploads/1/3/1/3/131398360/1111d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/81163148055.pdf
    • https://cdn.shopify.com/s/files/1/0430/5128/6690/files/lawerajazatusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/48978583949.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/bedobinarifixoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/2441/4882/files/latonowapobukuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/77566709220.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/12446425626.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/24743925601.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7253/files/76824255690.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/86164099131.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/letedutaxutamipivapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/25071328628.pdf
    • https://cdn.shopify.com/s/files/1/0429/1805/1996/files/canon_5d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/cystic_hygroma_management.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_off00007513.bin
0233b3bdf02e649394d055faf473d9fe1dac7176868b420cb06bfbc35f342673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 5444 bytes
font_01_sfnt_off00008773.bin
b80238511e4bdeeea44f5c7f3644a75935f0d95cb5668a16444c7490c57f3620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8773 10352 bytes
font_02_sfnt_off0000ab11.bin
a98d75d231bc01ceffc37623ef01a41ad5b66da1e8fee04d4dc7337400848715		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB11 7128 bytes

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