Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3d986b00ea972b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 01:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f988116948f243036d060cb850aec9e SHA-1: 10ff6025b718222f3cb304a684eabd5ad9e8cabc SHA-256: 8d3d986b00ea972b204185abab5de1e465ff1f1db22fc7f02f21b45fa4d191c0
152 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. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though partially corrupted, includes the target URL and keywords suggesting a lure for information related to solar energy. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=solar+energy+advantages+and+disadvantages+pdf
    • http://files.susiestewartportfolio.com/uploads/1/3/1/0/131070291/1987157.pdf
    • http://pedomogom.marieliterary.com/uploads/1/3/1/1/131163494/volorejawinala-pigofapelekom.pdf
    • http://files.firstathens.org/uploads/1/3/2/7/132710687/9347935.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/99019442327.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/63491855335.pdf
    • https://cdn.shopify.com/s/files/1/0451/0502/1091/files/mulasido.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/tewaxusixij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7501/8662/files/autumn_leaves_jazz_piano_solo_improvisation.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/verizon_smart_rewards_auction.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/93196199145.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/38544648232.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/old_free_bet_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/advanced_node_tapping.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/fakuwomapod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6163/3439/files/2629526176.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/79771638812.pdf
    • https://cdn.shopify.com/s/files/1/0441/1083/9960/files/adobe_reader_free_download_for_windows_xp_32_bit.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_off0000637e.bin
3124aa7355c25e18cae548c3ee2b7f1d5a3687e49616ad6abec66890c230e61a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 5476 bytes
font_01_sfnt_off00007631.bin
a6325aad940e2d71c58f86bd8582d8950620f977ee37413618290dd94766828e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 10172 bytes

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