Malicious PDF — malware analysis report

Static analysis result for SHA-256 9573110ca584f333…

MALICIOUS

PDF

48.8 KB Created: 2020-09-17 07:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13ea109d95fd17cbb3fa9148b06336f9 SHA-1: 361ebe7265bf16097c99cb74bcc51c402fe8c03a SHA-256: 9573110ca584f3330c3df3f70a9e7592972cb4b0bedc365d2fe53372d66af456
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=hackers+mod+apk+2020'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=hackers+mod+apk+2020
    • https://b1368c19-fab7-4b91-bd5c-3263c2cb86da.filesusr.com/ugd/a6e5e9_1cc728bbaa274fffa695e29b7fd7ce8a.pdf?index=true
    • https://e4cea5c5-be2a-4b93-aba1-d3684f410c34.filesusr.com/ugd/008e52_7be718b12cd04d93964d79d1b8a62443.pdf?index=true
    • https://7d4b97d7-e988-4af1-8216-67f4e3d00223.filesusr.com/ugd/0df15e_f47a9e8b3a364675a288ebdd10fe41b1.pdf?index=true
    • https://ac61a564-39d0-4061-a78e-68877b9c1afa.filesusr.com/ugd/f3cb45_5d4e005f24544886a408f001c13eb802.pdf?index=true
    • https://7840a9a4-e5ec-4f93-8ff6-148fe8cc319c.filesusr.com/ugd/28146e_184a73ae3e3b4bdea62fe0327f1f00e4.pdf?index=true
    • https://3044f773-15fe-4f4b-bd11-91aba954bff4.filesusr.com/ugd/fedf23_880c2c8bc28f4149979efd5d69bbbdde.pdf?index=true
    • https://0b59de2a-76e2-4894-abae-337391778b04.filesusr.com/ugd/1a1092_4da4dcbfed484e2fbfd0ac38f6d973c2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/fapamosupoloxive.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7504/files/aaja_nachle_songs_320kbps.pdf
    • https://cdn.shopify.com/s/files/1/0463/9916/0475/files/28945187330.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/geographic_information_systems_science_3rd_edition.pdf
    • https://5a7af5cb-a2db-4775-afe8-84051499c787.filesusr.com/ugd/daca0d_b839858d3f7842c585775b1889ab7971.pdf?index=true
    • https://708f0810-84e5-4394-a96b-b9e1791fdc61.filesusr.com/ugd/fedf23_31371bd068f048939924d06e99acb290.pdf?index=true
    • https://da924585-7e48-407b-9ac3-534ec248e8ed.filesusr.com/ugd/03f576_484040d3455a4a44927c070d1547fbeb.pdf?index=true
    • https://d02b99f5-d223-4d90-b366-65afad848116.filesusr.com/ugd/7dd30d_018670f9e6d94d43907e83060c3600df.pdf?index=true
    • 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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000607d.bin
bdde7c78b08f0b1b5558b488fbdb89ea9f573a666d27f60435ae7fb4eb8d7d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 5488 bytes
font_01_sfnt_off00007306.bin
d2d50cfdd9aec0311af27558555058e6987f4c9cbfefa04be3fd8b0d2db7a5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7306 2100 bytes
font_02_sfnt_off00007d01.bin
7918f5fd7bcd9f8483de1d0da9730e5b9889ac4a83e76191f723873f895b73f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D01 10340 bytes
font_03_sfnt_off0000a0b4.bin
0ed9aabc3f9bdc162842aa9344abf86b50193c6bbbc701c6ad592783dbaf3cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B4 16164 bytes

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