Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0909c1c5000dd73…

MALICIOUS

PDF

59.9 KB Created: 2020-08-08 01:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e336107eb4f1d0b2ce99abd8ce0bd65b SHA-1: fa20ac152c2a568cb99a0bf78e530f70ea85fa91 SHA-256: a0909c1c5000dd734a8b41147ce25460b806fd4e09e844a168205a780cbdcece
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, also contains the same redirector URL. This suggests the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.ru/pify?keyword=canada+political+map+pdf
    • http://tujefov.stalbansyracuse.org/uploads/1/3/2/6/132681579/dasirukesiwive-zirutuxasexi-zukanakol-moviwesewu.pdf
    • http://files.shopvintagedallas.com/uploads/1/3/0/7/130738725/lakek_solavadamuto_gumupejasiwiso_baleloveduvejum.pdf
    • http://files.gsm-inc.com/uploads/1/3/0/7/130775002/2a013.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/jayantabhai_ki_luv_story.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/92933100263.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/planos_arquitectonicos_de_departamentos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/32679263504.pdf
    • https://cdn.shopify.com/s/files/1/0434/7684/4694/files/sukajatasaliroz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/damojemibevagikora.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/sedexinazodifozujakos.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/7801442847.pdf
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/11575689348.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/dagotitogokinuzixuwaleg.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/pumifufasevubalonurireja.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/flat_out_love.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000b775.bin
2ee6768990f16884fc67a78970efddcb2b90528720b18d817b3d7b49cb382b3c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB775 18108 bytes
font_00_sfnt_off00006e60.bin
3bba4581881ae5f5f122ad7f2f15be475ceb33b9508630972159e3215394dd92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 4720 bytes
font_01_sfnt_off00007e51.bin
9a189d3e4a71da5fe35bd0ded56c13d5e2d503467ee24b56709a4dd9af4ef00e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 2952 bytes
font_02_sfnt_off00008a7f.bin
6976cedcec1b4bdba0ba3a3d235d898d12fb6c4680db0d52234a3f7bc56eca23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7F 14544 bytes
font_04_sfnt_off0000d366.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD366 4324 bytes

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