Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b57296f392e058…

MALICIOUS

PDF

39.1 KB Created: 2020-07-21 05:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7da43ccbe019644fc87bf826f6b2277 SHA-1: ed9a6c511c2649595d7e18e87b1aab27ae43e3d5 SHA-256: e7b57296f392e058c336919785d4c33b0c3997142e9af233094fe76f3c84d7bb
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, forming a link farm designed to obscure the ultimate destination. One of the primary links points to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains text related to a sewing machine manual, suggesting a lure to entice users to click the malicious links. The ML classifier strongly flagged this PDF as malicious.

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/wb?keyword=shark%20euro%20pro%20lcd%20sewing%20machine%20manual
    • http://files.amanapopcornandicecream.com/uploads/1/3/0/8/130874493/772293.pdf
    • http://files.konzacoffeecompany.com/uploads/1/3/0/7/130775490/tumadigemebumewudeg.pdf
    • http://files.okanaganayurveda.com/uploads/1/3/1/6/131606844/b4d68e.pdf
    • http://files.tasty-ink.com/uploads/1/3/1/6/131637169/kiwavemasomiwinubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/devoxibatuzosuzivubavu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/narogejejogutejuxogexub.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jiketijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/segil.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/tuwigelidibe.pdf
    • https://zegagiriruj.files.wordpress.com/2020/07/34213630696.pdf
    • https://tigifelaziv.files.wordpress.com/2020/06/besono.pdf
    • https://fogegajavori412085768.files.wordpress.com/2020/06/kutopexagefulemefovu.pdf
    • https://zafususu.files.wordpress.com/2020/06/setafabikes.pdf
    • https://fudimasunu.files.wordpress.com/2020/07/jupasuxutabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12319118289.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/42753718416.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/wewotibumesirububuzufak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/75617739968.pdf
    • https://cdn.shopify.com/s/files/1/0433/4714/8950/files/2531824229.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/goganobikuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/gekoxiliwabuxatakugizowo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/75404444851.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/wajulolivalajorefevipewas.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_off00005b59.bin
2cf4ba228b02eceedebde29540eee77a9582e9f55e5673404c2d01a03cba086f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 5548 bytes
font_01_sfnt_off00006e09.bin
bd5ff031337760030f553b86f9fe6c05dba5b59297ac2efad92c2dfcd1378753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 9556 bytes

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