Malicious PDF — malware analysis report

Static analysis result for SHA-256 341218832bcaddb0…

MALICIOUS

PDF

35.3 KB Created: 2020-08-04 03:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3440c8b369fc13fe5a651d2ccd0d1c9e SHA-1: a7404ad20149128cff46cfa581f49cbcf8bdc014 SHA-256: 341218832bcaddb0260c38acbde0c82133c9aa0e3925110db0a20324143880ae
154 Risk Score

Malware Insights

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

This PDF document contains a link to a redirector service, which in turn points to a large number of other PDF files hosted on Shopify. The primary link is disguised as a search result for academic material, suggesting a lure to download potentially malicious content. The ML classifier strongly indicates maliciousness, and the presence of a redirector link further supports this assessment.

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=sociology+by+anthony+giddens+pdf+download
    • http://files.afrogood.com/uploads/1/3/1/4/131438280/675494.pdf
    • http://files.mariosmathtutoring.com/uploads/1/3/0/8/130874046/zivajezak.pdf
    • http://files.grannysherbs.com/uploads/1/3/1/3/131379409/4952658.pdf
    • http://files.seahawkstrackandfieldacademy.com/uploads/1/3/1/8/131857494/firijifu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/kotapudazom.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/john_deere_l110.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/mwt._net_bulletin_board.pdf
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/jasez.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/gowafenipuwelozodiro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/91880988884.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/iptv_playlist_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/complicaciones_del_trasplante_de_medula_osea.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9367/files/puxetuxinivotadaravim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/70549029639.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/xoruretumatifefeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/megobozarifovi.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_off00004af8.bin
98c6ba353585e6a4103eb22fb4051e608a8d3126feb8f54654031bc834a03356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF8 5760 bytes
font_01_sfnt_off00005ea4.bin
647670d1c593c72bf7626466d5656b4c1df2eacee6548dae81032a45ac4cc166		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 10008 bytes

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