Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c7859e8ba337a8…

MALICIOUS

PDF

66.6 KB Created: 2020-08-08 03:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef062836cdd9d609f927eee4bb2a9680 SHA-1: cdac471c0a09f8030b7f70506a8af398558e7d75 SHA-256: 42c7859e8ba337a8bfd3575b4ad934eeda714625c24ec738c0fc9867520764e5
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The embedded URL points to 'ttraff.com', a known redirector. While no scripts were extracted, the structure and heuristics strongly suggest a malicious intent to redirect users to harmful content.

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=route+of+drug+administration+pharmacology+pdf
    • http://files.brittanyschmutzler.com/uploads/1/3/1/6/131637385/6544179.pdf
    • http://nimewi.peachtreetally.net/uploads/1/3/0/8/130813834/2002708.pdf
    • http://files.thgrill.com/uploads/1/3/1/6/131606094/zumusupawome-pamotobimudivam.pdf
    • http://files.ourladysproductions.com/uploads/1/3/1/3/131383977/c5a0ef8c8e.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/ultimate_marvel_vs_capcom_3_character_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98455436519.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/doxigibav.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/veragemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/8046795553.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/31220524708.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/vomurafebetexutu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/duwilovopejodalevuloj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/tableau_de_conjugaison_verbe_etre_et_avoir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/xumovatenojij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/bexukatinazolomokolam.pdf
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/43669583780.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_off0000c691.bin
d7f8a4b2cffce6c8ddedacc738e9303ded51a1fd7b11fceb30cb122f0afa82a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC691 5680 bytes
font_01_sfnt_off0000d9ce.bin
6e7d2520983496b28fa1c167a8dc4eda7a60fb78cfa5f433dc4b21b8cc6e3d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CE 10240 bytes

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