Malicious PDF — malware analysis report

Static analysis result for SHA-256 d945fbdc10885dd5…

MALICIOUS

PDF

41.4 KB Created: 2020-07-12 07:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb187fb8ff0fccfcbc79b081b935ba18 SHA-1: 4279bfa63f9d17561fbdc91d7315a286bf5ee249 SHA-256: d945fbdc10885dd5972dc29be127ec0de4e94ca3c5df9eb98f796489871b46ef
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files, a common tactic for SEO poisoning and distributing malicious content. One of these links, 'https://ttraff.com/pify?keyword=minecraft+apk+android+sin+licencia', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Minecraft apk android sin licencia', suggesting a lure for users seeking unauthorized software.

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.com/pify?keyword=minecraft+apk+android+sin+licencia
    • http://files.ernst-arch.com/uploads/1/3/1/3/131398022/vukeri.pdf
    • http://files.kathrynemyoung.com/uploads/1/3/1/0/131071076/porewuvofadaxa.pdf
    • http://files.livinggodsmission.com/uploads/1/3/0/8/130874413/femobupowufebekoluta.pdf
    • http://files.headhuntersltd.co.uk/uploads/1/3/1/0/131070116/9415496.pdf
    • http://files.baconsmiles.org/uploads/1/3/0/8/130813400/vibuwefimili_zokenafusax_vujobuxomisirod.pdf
    • http://files.touchofego.com/uploads/1/3/1/3/131398447/5473341.pdf
    • https://wipexomab.files.wordpress.com/2020/06/gukorevewatididuzonide.pdf
    • https://vupufipa.files.wordpress.com/2020/06/78216851543.pdf
    • https://dozobozugut.files.wordpress.com/2020/06/30246551749.pdf
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/68369046014.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/nibinudaxakusiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/keperuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/fuwifozasuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gopag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/71848196548.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005465.bin
62f62399d52b6eb0d7524efe0927754d41cebe2b1cc3e09db8cdbeef5171a946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5465 3740 bytes
font_01_sfnt_off000061c8.bin
0fe2a817ce3d5bcd2320bbc276518f35672bf93b83fceb1358d77538ee6558ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 5004 bytes
font_02_sfnt_off000072d2.bin
96b7441a34466f547eb4e22a0e35d5cec47b5d3340c4160b362e4fd2508f4395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D2 11656 bytes

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