Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7e390730839b9c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-02 21:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f791225b6d4c9841cca49f01204043eb SHA-1: 4699e998c083542cee82f32cee95c0ff6651c769 SHA-256: fa7e390730839b9c90bf3ec3f340c173d10a97fed80a4ac3a70e08336bd4da74
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=62078+iphone-+sync', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a link farm or redirection scheme to distribute malware or conduct phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=62078+iphone-+sync
    • http://files.slykerfamilyministry.com/uploads/1/3/1/4/131454850/gemunufurenotu-zupugexokek-jonago-puwexumabobe.pdf
    • http://files.memorablemomentsbymichele.net/uploads/1/3/2/6/132681698/danoxufavitunew_setisav.pdf
    • http://files.graceinwellsville.com/uploads/1/3/1/4/131406391/6676029.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/87659292923.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/girexitatusexuzowazil.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/tapuwoxuwesifexese.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/45176490045.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/kadarigurawekituzeguf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/pobonuzakobuvuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/89321916621.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/dijutudesaferadivapeven.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/duwifedavigejilipubibom.pdf
    • https://cdn.shopify.com/s/files/1/0437/3289/3857/files/ps3_skyrim_mods.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/21030394301.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/pemel.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/60092710647.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2633/files/tiwojovebetabokusow.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_off00006b72.bin
cce3f848764e5bef73b91d9574fe7b54a57292c813664907129d935f59ee824e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 5424 bytes
font_01_sfnt_off00007e02.bin
84f6d8a7d7866a0901f5bc9ed721eb4744c33e75e48046f33241c0a88d7e2f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 9996 bytes

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