Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd41cb68f334a13…

MALICIOUS

PDF

56.1 KB Created: 2020-08-01 05:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2039f7dad8dba1dc0bb7987857c94d9 SHA-1: 0a32a40180f8d75564da9a04dbc8fb44cfe0efe8 SHA-256: bbd41cb68f334a139cffe000ac1b7e4f35c8b132e697f5354ca954f873f09796
154 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Forensic files episode list' and is heavily populated with external links, many hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.com'. The ML classifier also flagged this PDF as malicious. The presence of numerous external links, including a known malicious redirector, suggests a phishing or malicious redirection attempt.

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=forensic+files+episode+list
    • http://files.srisaiinfotechsolutions.com/uploads/1/3/0/8/130813536/9154222.pdf
    • http://files.kuwaitotasom.com/uploads/1/3/1/3/131378991/vevap_fowenad.pdf
    • http://files.thefashionanalyst.com/uploads/1/3/1/3/131383624/wezunawe.pdf
    • http://files.paloaltochineseschool.org/uploads/1/3/1/8/131856225/nenonotebu-vukigijatade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9150/9919/files/56620267887.pdf
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/vurozafeje.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/57403481879.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/bidenovisimusowagososan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/werixoxiwubalazigafupefez.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/69997382623.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/37521527151.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/totunorixasimotibep.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0302/files/migok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/79616969303.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/wukadidefel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7485095273.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/47880370881.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/list_of_us_cities_by_population.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_off0000901e.bin
f9358963f2d08651f901c6634b6880e4dca2fcfd4a94bac06579d4d4a606e681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901E 4680 bytes
font_01_sfnt_off0000a010.bin
a24bcf0719711490efe4cfbdd4697df400352c0e37afd987b4aee26fa95e8c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA010 10864 bytes
font_02_sfnt_off0000c531.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC531 4324 bytes

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