Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b5126341c850ba6…

MALICIOUS

PDF

53.5 KB Created: 2020-08-19 06:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b3cc0e6d0408475b75f1f8272f24ec8 SHA-1: 8081bac2701a96715adb9d2136deb73189ac3bbb SHA-256: 0b5126341c850ba685e432c1e15c9da7978a8239e3f9f73af8643a31dbf1be83
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as a game trainer, which is a common social engineering tactic. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to drive traffic to potentially harmful sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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=assassin%2527+s+creed+origins+trainer+1.+51
    • http://files.connectaccounting.co.uk/uploads/1/3/1/0/131071167/6d2a9f6b01.pdf
    • http://boxasa.thepaintedladynapavalley.com/uploads/1/3/1/3/131380600/ritozugi-nizilidomugemab-valoxuwubanurum-sigenesoverufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/xukorud.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/fugusijuvinapez.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/namutevajiwutabijituwev.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/skyrim_se_enderal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/rotudigupuvonezulelu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/97098861283.pdf
    • https://cdn.shopify.com/s/files/1/0434/1602/7303/files/code_formatter_in_sublime.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3976/files/nivata.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/warera.pdf
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/chiefs_schedule_2020.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070f6.bin
997311a3626699313788b6453fc78aaf2dd1ad6b2a88ba2cceaa3183abd069d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F6 5096 bytes
font_01_sfnt_off0000825a.bin
8632713b2dad21066f645013be91813a395c65abfe52c770099de327b93faa6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 10300 bytes
font_02_sfnt_off0000a5db.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5DB 16092 bytes
font_03_sfnt_off0000baa2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA2 4324 bytes

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