Malicious PDF — malware analysis report

Static analysis result for SHA-256 112adcf22b3a02d3…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 07:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f10983cb2290c4bd6d0fc908ca12191b SHA-1: 46df15062242c6f50731d8c2d8abf4b7c89cc9f9 SHA-256: 112adcf22b3a02d39e51ebd10cc733e6eb1ae3d9a77a860656c368dd1558afaa
234 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. It also exhibits characteristics of a payment redirection lure and MFA harvesting, suggesting a phishing or business email compromise attack. The embedded URL is likely the primary mechanism for delivering the malicious payload or harvesting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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=android+file+transfer+to+iphone
    • http://files.fellowshipwesleyanchurch.org/uploads/1/3/1/3/131380107/90058.pdf
    • http://fetig.cherryhillspeech.com/uploads/1/3/1/0/131070761/fd1575f0f71.pdf
    • http://bedesum.meganwestman.com/uploads/1/3/0/9/130969953/binazedulok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/hiv_testing_guidelines_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7192/files/81865518827.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/31189557923.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/71084129394.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/35970897915.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/construction_methods_and_management_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/50828542005.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/8876166894.pdf
    • https://cdn.shopify.com/s/files/1/0440/2426/6917/files/msrtc_advertisement.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/28605337278.pdf
    • https://cdn.shopify.com/s/files/1/0436/2538/2051/files/zajalubivepakolefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3794/1160/files/56900133428.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006463.bin
48df88a894f4939bde4924977875aa9047e7cd70f557f8aad7aa7d8d09bef1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 5120 bytes
font_01_sfnt_off000075bd.bin
3340f952f1e7deb5a032f585f9f8ab6d7ecc73f575057ccb89cbd22b5f383463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 10356 bytes

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