Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f1ec10065b54d8…

MALICIOUS

PDF

78.0 KB Created: 2020-08-21 04:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc4d7b693410001da00bae950c70f6e6 SHA-1: b63de7db2e25cf4bb653569d571f9df729228b5e SHA-256: e0f1ec10065b54d84ffb2760d4359d82403b3875d720c5bd92caa6bc74d0a4cf
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with 30 embedded external PDF links. One of these links, 'https://ttraff.cc/pify?keyword=yann+tiersen+tempelhof+sheet+music', points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites through a deceptive link farm.

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=yann+tiersen+tempelhof+sheet+music
    • http://jowejula.destinationapp.co.uk/uploads/1/3/1/0/131070355/welupekoferikalu.pdf
    • http://files.iwfmichigan.org/uploads/1/3/0/8/130874204/zokuzobexofelazufadu.pdf
    • http://files.thevikinglawyer.com/uploads/1/3/0/7/130738969/xofilumanofat.pdf
    • http://bigib.goodhandtheatre.com/uploads/1/3/1/4/131407668/dipunirow_jusakusikoga_jenenukejiki.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5213/files/californication_season_7_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/dld_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/7873/4239/files/dowogalafidud.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0528/files/44709265668.pdf
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/antisepticos_bactericidas_y_bacteriostaticos.pdf
    • https://cdn.shopify.com/s/files/1/0436/7994/0761/files/inspirational_quotes_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/kixajixisonelo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9911/files/85119059989.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3658/files/pokemon_ancient_origins_card_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/39231970480.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/citrix_receiver_ubuntu.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_off0000dacf.bin
ab3529f56af89de48628e4d1b3b2f35edc1b12b66704513cf3cfd27cf5526764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDACF 5216 bytes
font_01_sfnt_off0000ec59.bin
4c765c53cb671bdcdecd0f104852ef2ea194bafa17c57a32ad98e3a747c299f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 11804 bytes
font_02_sfnt_off000112c3.bin
f53b43e12006e3d52612f085e6e184fa5bba3604999f0cb64562e6bb996dc06b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C3 16384 bytes

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