Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b316f965d7a80a…

MALICIOUS

PDF

81.5 KB Created: 2020-08-08 11:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90f791a32349beebae22b730a63fc83a SHA-1: 696acb1eaf79d7af2a92af765ed5326114468512 SHA-256: 11b316f965d7a80ac30d5c8276f6290e505e34b396dac9be23582143cd96fa49
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically `ttraff.com`. The document body, though heavily obfuscated, contains text related to a dictionary and the authoring application, suggesting a lure. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm designed to obscure the malicious redirector.

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=amharic+to+oromo+dictionary+pdf
    • http://files.theresearchmonster.com/uploads/1/3/1/3/131380107/67e08cd7fb83.pdf
    • http://files.tiffanycrowhurst.com/uploads/1/3/0/7/130775867/timinalowufobej-bixosujejenid.pdf
    • http://tadedune.jillshooktherapy.com/uploads/1/3/0/7/130775840/29c116da.pdf
    • http://files.michaelbigelowdixon.com/uploads/1/3/1/0/131070651/f479b1ab2fe6.pdf
    • http://files.brokenhartarena.org/uploads/1/3/0/8/130813692/7428ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/beriwupodakemufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/91822552431.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/45321921708.pdf
    • https://cdn.shopify.com/s/files/1/0429/5357/2515/files/milubodigojad.pdf
    • https://cdn.shopify.com/s/files/1/0439/1524/7771/files/example_of_accounting_equation_problems.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/55589178462.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/jikupi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/42128410878.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/nupukaninixosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/wind_waker_soundtrack.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_off0000cef2.bin
705c0103e9650ca90adffc490e1ce9160435b80503516debd1e43cc39a82f2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 7160 bytes
font_01_sfnt_off0000e112.bin
cd980137613eadc31b0d7165c0060d4dc5782dbfed3d6708ea319096c11e4fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE112 5276 bytes
font_02_sfnt_off0000f2e4.bin
ee68d2bc11c891d8c6a57b002460c7b958614a85c4a842536cdb0aea56ad2d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 15524 bytes
font_03_sfnt_off0001231e.bin
757edbe9ca696dc752e8794cc2fab55b744a24b197aba41abea0c8f583a0f3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1231E 16116 bytes

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