Malicious PDF — malware analysis report

Static analysis result for SHA-256 019a885889c4fb44…

MALICIOUS

PDF

49.2 KB Created: 2020-08-07 10:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5569ec9b3a71d0ad2a60943ebc41537c SHA-1: fc31b1c09deac1e3add93ce91237fa629022bfed SHA-256: 019a885889c4fb448e562d78958ad1dfde5a0ab866a4b477fcce8456b0b3cbdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=cabinet+minister+2020+pdf+download', leads to known malicious infrastructure. The document also features a large number of external PDF links, many of which point to unknown or potentially malicious domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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=cabinet+minister+2020+pdf+download
    • http://rugeku.freebiequeen13.net/uploads/1/3/0/7/130775062/004a953a59b5.pdf
    • http://konaga.reflexologystudio.org/uploads/1/3/1/6/131606289/6043538.pdf
    • http://bopidi.ninthdistrictdems.com/uploads/1/3/1/4/131406202/dosurafaboginogula.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/99111496441.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/angielski_czasy_ciga.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/exercices_corrigs_automatisme_industriel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/47940812830.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/ielts_vocabulary_writing.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/36557118454.pdf
    • https://cdn.shopify.com/s/files/1/0434/2792/2076/files/soxeruvufidozi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/26598052538.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/juviruzelalupafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/radijimizegilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/after_effects_tutorials_in_telugu.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_off00007679.bin
6945f08255a381dc762bb0e189c4da723caf61594bfd37644ed7ec8e05648b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 5596 bytes
font_01_sfnt_off00008972.bin
628c709e916eab2fca302253beddea547021075953d206cdb3f3e6b278ebac23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 10152 bytes
font_02_sfnt_off0000ac5a.bin
d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5A 2832 bytes

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