Malicious PDF — malware analysis report

Static analysis result for SHA-256 5637425bf6493017…

MALICIOUS

PDF

56.1 KB Created: 2020-08-09 20:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 128ee5ed6a89760d9d46c36884f7ac38 SHA-1: a7a0301c86da56d0b84955f9595d42af22bf9dfe SHA-256: 5637425bf6493017a367f6e894e170a5db46dd182363216a4be9a6b942e9a076
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded external links, characteristic of an SEO link farm. One of these links, 'https://ttraff.com/pify?keyword=data+acquisition+system+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking Shopify URLs, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious verdict.

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=data+acquisition+system+pdf
    • http://files.sandybonsib.com/uploads/1/3/0/7/130776401/wunewa_xiluribeso.pdf
    • http://files.saverahwaypark.org/uploads/1/3/0/7/130740563/pilomege.pdf
    • http://files.lunacatfluencer.com/uploads/1/3/0/8/130814066/2469943.pdf
    • http://files.gennyglosierartist.com/uploads/1/3/1/4/131452949/zapemusujituwusal.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/viwibizojizafalojoxuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/akame_ga_kill_subtitle.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/fugukof.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/74606217572.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/lutojefexeka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/38706357578.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/3607432882.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/18300748584.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/69922645608.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/vuranewawobifitupesoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/kizuwubarunopitakufof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6272/files/caryl_churchill_love_and_information.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009612.bin
adcad586023087d0305a88c240eea1adb7ce40c7840247f5e5533d71f0dcdf51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9612 5400 bytes
font_01_sfnt_off0000a874.bin
e236353065860c87a4e9a596a61063324cc11e82b7023a571b4029affc6c5625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA874 13624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.