Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccd8f0b317ff07e…

MALICIOUS

PDF

58.7 KB Created: 2020-08-09 18:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e180afc4d4736b3738fc893e277dd897 SHA-1: 13de865624513e696b021f96a4d3b222cdfa75e6 SHA-256: 4ccd8f0b317ff07e7c9c2d3bca70495eddac05671935dce079f6810e1ecf4d58
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=starwood+brand+standards+pdf, which is designed to lead users to further malicious content. The document body is heavily obfuscated, but the presence of numerous links and the critical heuristic firings strongly indicate a phishing or redirection attempt. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=starwood+brand+standards+pdf
    • http://zevufi.jhuntermotivatingminds.com/uploads/1/3/1/3/131379732/fagosigekijerebupuva.pdf
    • http://memupuw.dfalvey.org/uploads/1/3/0/7/130739625/2886053c0eaeb.pdf
    • http://files.beckymathisportraits.com/uploads/1/3/1/6/131607163/wawevavaduvolejimit.pdf
    • http://files.iankingsley.com/uploads/1/3/1/3/131383386/katutazafesejif_walunuwag_tiwum_mufifeboju.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/runecloth_bag_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/last_stand_2_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/xujowegizedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/77311129836.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/getting_the_love_you_want_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/50600269205.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/chhattisgarh_outline_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/93423525354.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/fijuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6572/files/kumpulan_action_script_macromedia_flash_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/biriga.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/94738584878.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_off00009ba2.bin
ae3589ba62a71c3811fc7319a74f4e98b53cacb6b6becc68bdec3d72b14ff889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA2 4960 bytes
font_01_sfnt_off0000ac7f.bin
e9b425ab40e26299e11fde99ab186faa1b2eadc5b6092275bc6e9062fefea33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7F 10304 bytes
font_02_sfnt_off0000cfb1.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB1 4324 bytes

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