Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2f97821425f2fb…

MALICIOUS

PDF

50.0 KB Created: 2020-08-09 20:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36a82bb10b358eb74de872e9a5d90ae6 SHA-1: c2e55d88c551678b30390f6c3b923e27357128c6 SHA-256: cc2f97821425f2fba3560605ae94ec4e62ec1939548b3796a72a8ecf7e6667c7
152 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 link farm hosted on Shopify. The primary malicious link redirects to a ttraff.com URL, which is flagged as a malicious redirector. This suggests the document is designed to drive traffic to malicious sites, likely for further exploitation or malware delivery. The ML classifier strongly supports the malicious nature of this PDF.

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=bangladesh+liberation+war+books+pdf
    • http://vezuxa.wordwulf.com/uploads/1/3/2/6/132683014/9118597.pdf
    • http://files.bygraceshesgood.com/uploads/1/3/1/3/131398088/998669.pdf
    • http://files.chriswallmedia.co.za/uploads/1/3/0/9/130969151/fejabifagi.pdf
    • http://tafikitu.reederschurch.org/uploads/1/3/1/0/131069934/1804652.pdf
    • https://cdn.shopify.com/s/files/1/0433/9689/0785/files/the_knights_sword_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/smoke_on_the_water_drum_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/glossary_of_computer_science_terms.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/rabutumulob.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/administrao_de_produo_e_operaes_henrique_l._corra.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/39387497955.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/abramov_lex_uncovered.pdf
    • https://cdn.shopify.com/s/files/1/0438/4735/2480/files/bissell_little_green_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/85247384990.pdf
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/8419526898.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/event_id_4624.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dcb.bin
d58d0214e1432bd5a8091f6d2bcc4fd9ecf89e80b94708edb1078ba9cab3d95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCB 5436 bytes
font_01_sfnt_off0000703c.bin
2a4da1b681c25a1ff299bd27213734f8dc7d41b26af86dde983e2aba38898cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703C 7848 bytes
font_02_sfnt_off00008a04.bin
b5465c99174a40537836c6eaf9340d8dcacb25123d538231d7036e7070ae79b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A04 10112 bytes
font_03_sfnt_off0000acae.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACAE 4324 bytes

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