Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc44dcc2540f94d4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-21 10:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed5508a86164258d06b4f6c7a8e28094 SHA-1: 32bd793eab1b939563eaba5195da22c70bab274c SHA-256: bc44dcc2540f94d48c542dccdbc5b64a71c4a836b1f4905a68901b1c1ed01786
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com, which is used in a lure related to 'auto clicker for idle games android'. The document body also contains this URL and numerous other links, many hosted on cdn.shopify.com, suggesting a link farm for SEO manipulation to distribute malicious content. The ML classifier strongly indicates maliciousness.

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=auto+clicker+for+idle+games+android
    • http://files.parkscustomhomes.com/uploads/1/3/0/7/130740112/5329082.pdf
    • http://files.geoffalainllc.com/uploads/1/3/1/1/131164239/pogiwopu_wuragepot_raposurobuje.pdf
    • http://ditudeta.wcsinstruction.net/uploads/1/3/0/9/130969536/8138534.pdf
    • https://cdn.shopify.com/s/files/1/0428/0441/2583/files/55334022053.pdf
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/nekavevevalubuvaseduwuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tapowizilefaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1431/4405/files/gimip.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/xuvererukazipejakurebig.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5970/files/single_best_exercise_for_lower_back_pain.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/doruzudejazelon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/borutazaweluv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/61790092080.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/ct_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/deribawolulolerotevupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/59784595355.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0447/8933/4177/files/morphology_of_plants_and_fungi_bold.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_off00006680.bin
36352533db1dd8379087975867c5ad0bd5b8b1e9bc8e092a2008fe50e82070fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 5396 bytes
font_01_sfnt_off000078ba.bin
edc0225b1916ab361c05d3dfc1e206ca92234c667debfa009856da03dbd77658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BA 10364 bytes

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