Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd050884e43ac026…

MALICIOUS

PDF

50.0 KB Created: 2020-08-17 00:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fadc7ff210a599ef44f76c9bf4a92db2 SHA-1: 60e42d99aebccf8526a7e7e55b2b4ded89931044 SHA-256: dd050884e43ac0267ed042cb0ee24ecd3ef6f3f1e4c2b8ee589f8c6270bfef5d
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=hot+works+permit+template+free'. Another critical heuristic indicates this is a link farm with many external PDF links. The presence of these links suggests a malicious intent to redirect users to harmful sites, likely for SEO poisoning or to distribute further malware.

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=hot+works+permit+template+free
    • http://janudor.yeaflicker.com/uploads/1/3/0/8/130815097/9299f9fc1.pdf
    • http://files.cmcpressurewashers.com/uploads/1/3/1/1/131163740/58e1f029f.pdf
    • http://girig.artworkskenosha.net/uploads/1/3/0/8/130813765/4257179.pdf
    • http://sizumel.ivcsudh.com/uploads/1/3/0/7/130739564/757228.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/94107007274.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/41299073159.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/safatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/98741136761.pdf
    • https://cdn.shopify.com/s/files/1/0431/3471/4017/files/up_board_class_12_biology_practical_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/35332288727.pdf
    • https://cdn.shopify.com/s/files/1/0448/1469/6614/files/environmental_baseline_study.pdf
    • https://cdn.shopify.com/s/files/1/0430/8244/9045/files/retirement_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0434/0557/4311/files/adobe_photoshop_fix_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/zotaputasixaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/gusakamuneritagiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/best_place_to_farm_tellurium.pdf
    • https://cdn.shopify.com/s/files/1/0455/8025/5397/files/two_dimensional_shapes_and_their_properties.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_off000086a9.bin
3a0d49338742716ecac73866ecd73096cc4eaeb3b6ab026154ac35c89db95f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A9 5164 bytes
font_01_sfnt_off00009838.bin
7ae382ed736c1d5b340be70b9f128bc5e18e8e1e285f95111912218bd4548cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9838 10244 bytes

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