Malicious PDF — malware analysis report

Static analysis result for SHA-256 9709ebff1637fc9a…

MALICIOUS

PDF

50.7 KB Created: 2020-08-11 16:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28c257800150f972d019c78f25731508 SHA-1: 07a1a110e95416f8580c6709645feeeae1cf9410 SHA-256: 9709ebff1637fc9a38615fd401e8ffcfbf3f4f679e1ab2f412c0fd4c45c062db
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click the malicious link, likely leading to further compromise.

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=chakrasamvara+mantra+pdf
    • http://files.canoetaxi.com/uploads/1/3/1/8/131871729/6677909.pdf
    • http://files.buybacktheblockvip.org/uploads/1/3/2/6/132682093/2111636.pdf
    • http://degozar.oshkoshmainstreetmusicfestival.com/uploads/1/3/0/7/130776177/lukepuwuxisofejar.pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://files.artwithross.com/uploads/1/3/0/9/130969488/kutageguj_lusitezikoguno.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/dunavoxilupo.pdf
    • https://cdn.shopify.com/s/files/1/0447/1944/0028/files/cambridge_ielts_book_8_listening_test_3_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1588/7256/files/lower_back_pain_physio_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/bokil.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/kexagilu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/48361378200.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/83166739278.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/damedofapuzoxijexizufiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/vasax.pdf
    • https://cdn.shopify.com/s/files/1/0435/8697/7949/files/50317518390.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/accounting_basics_for_interview.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9212/files/9455863446.pdf
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/jenufapajezufijogub.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_off00008999.bin
91e66211dc17fa0e9db563447083c1479435370b47e52a7953b08c77741abed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8999 5276 bytes
font_01_sfnt_off00009b6e.bin
a3b6b84794dec8bda047cbce9b1a1131f79d6565c8485bf2d2b3147f60e09537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6E 10076 bytes

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