Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1b744625e8940b…

MALICIOUS

PDF

51.2 KB Created: 2020-08-09 05:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a4e4f8e63e00ee712d0a4e1fd994c1b SHA-1: 86e71ab8498c0729f51f8d815e4274cfeda5f70f SHA-256: 7b1b744625e8940bba913a2823578d5a491d1b9631a462d313750443aed1a768
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 other PDF files hosted on Shopify. One URL, 'https://ttraff.cc/pify?keyword=andhra+pradesh+government+schemes+pdf+in+english', is identified as a malicious redirector. The document body is heavily obfuscated and appears to be a lure for government schemes, likely to trick users into clicking the malicious links. 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=andhra+pradesh+government+schemes+pdf+in+english
    • http://files.continuingeducationwnc.org/uploads/1/3/1/6/131607075/ab5c8b23b62deac.pdf
    • http://jojozim.beadsocial.com/uploads/1/3/1/4/131437886/dopilafutuja.pdf
    • http://sigoge.alengthofrope.com/uploads/1/3/0/7/130775506/2463313.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/wixat.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/7_habits_of_highly_effective_people_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/kenshi_slavery_mod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40814320730.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/76931265156.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/soduvujigesar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/xewibaxoko.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/roponuwobujoruzupijera.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/maxigamopifoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4726/files/janivejusoviwuwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9667/files/lekilix.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bca.bin
3784d2b371bd6dd8cbe30e2c44cf3adeee1f94df86e4a0c34646ee271136d8b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCA 5408 bytes
font_01_sfnt_off00007dfc.bin
1714aea6da5e51fe931d750bc60a52e5b462545b4bf58f0738093f4f8fc96c4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFC 4696 bytes
font_02_sfnt_off00008efb.bin
a3d3ee6d3b8188bd29d17dfe761ae348e6247db6f9a37a8235f1d0fc9e5d13ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFB 10080 bytes
font_03_sfnt_off0000b17b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB17B 4324 bytes

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