Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dba04c65cc08470…

MALICIOUS

PDF

53.1 KB Created: 2020-08-19 15:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2b81d15fe2abdd75504ed4c3f4a71a SHA-1: fd90be42d42790c795010a65d0f1204af3718349 SHA-256: 7dba04c65cc084701abd7353fb3c988ce1d371e2c639fc0f4c616795073664a9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO abuse. One critical finding indicates a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=charlie+movie++in+isaimini'. The presence of a 'download button' heuristic further supports the lure of clicking a link. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=charlie+movie++in+isaimini
    • http://files.kreativtouch.com/uploads/1/3/1/6/131606011/pikivutaze-jujakab-japubifovadede-mugoku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/the_heart_manual_bm_hegde.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/77980585726.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/ninomorerurametixel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1661/files/65544486486.pdf
    • https://cdn.shopify.com/s/files/1/0428/9822/7353/files/54560233237.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/zubimuzolabiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/patepuzinelisabasififi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/maluxerijinopapakolubub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/dazudixetuzumidujogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/piwojilofukagabavabanemi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/telephone_billing_system_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0450/0144/1448/files/the_ultimate_rpg_character_backstory_guide_tg.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/55923615906.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/zusuxazekafebopexiwopenut.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bbe.bin
705377623a4c4344e02470fedf876d1ed6f0c7c0eac322cafb15afc9430d14bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 6440 bytes
font_01_sfnt_off00007bb2.bin
bc518452c7e1ea0ff54d95f55c3cf6110f8ad02b8ebd0fbb783d190e7b011940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB2 4892 bytes
font_02_sfnt_off00008c31.bin
f7c20f6896cb4ba72d59d83aad997b86bd35e399f192cb1581f9060aec881b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C31 10684 bytes
font_03_sfnt_off0000b0c4.bin
27d5aa48a66ed6e24074f1b6b97defbd08161f468927a62883f94c9ec160026f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C4 16384 bytes

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