Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f6ab5f912a5fe9…

MALICIOUS

PDF

58.4 KB Created: 2020-08-08 02:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1793234e3f7923d3f426166d2c4ecb9 SHA-1: f8b7f7796cb444b437a3e91cb8ca1adbed1a201c SHA-256: 73f6ab5f912a5fe973e243d458c8947a499a178e356d8cbeab96bf924baf5f54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning attempt. Crucially, one embedded URL, 'https://ttraff.cc/pify?keyword=bekhayali+lyrics+english+pdf', is identified as a known malicious redirector. This indicates the document's primary purpose is to direct users to malicious infrastructure.

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=bekhayali+lyrics+english+pdf
    • http://files.gassingamerica.com/uploads/1/3/1/4/131409210/wezarasuveledabixif.pdf
    • http://files.communityconnectionsaz.org/uploads/1/3/2/6/132683181/6f2fdfffdeecc3.pdf
    • http://miruguvo.youngscientistsseachest.com/uploads/1/3/0/8/130815017/wojapovuzefusiralame.pdf
    • http://files.impunity.site/uploads/1/3/2/6/132681204/lefopogi.pdf
    • http://files.medalmulisha.com/uploads/1/3/1/3/131380427/9d5bab28473a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/diagnosis_banding_hernia_umbilikalis.pdf
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/gikijekalividelijab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/29014870109.pdf
    • https://cdn.shopify.com/s/files/1/0439/3231/9899/files/flatten_2d_vector.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/cat_daddy_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/49733726340.pdf
    • https://cdn.shopify.com/s/files/1/0435/0581/1608/files/81807825763.pdf
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/byrne_v_van_tienhoven.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/85269209187.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/curriculum_development_in_second_language_teaching.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/joborofefawodojoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/fiberunixuk.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000799b.bin
f3ce65375de8c2adf6bc0b442f2b6a8a2eed44f741404afcf19d7d86c3836fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 12504 bytes
font_01_sfnt_off0000a249.bin
226a2d5c20865943f674969bfae24a93c73f18b11e6c68080125fc0c981e3b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA249 5632 bytes
font_02_sfnt_off0000b587.bin
d33b662cf4003162742b096d3d22fac69583060d2fba79a93a636ce4a0999f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB587 10780 bytes

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