Malicious PDF — malware analysis report

Static analysis result for SHA-256 01662ef54f904948…

MALICIOUS

PDF

57.3 KB Created: 2020-08-08 20:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0797472e6663e6a200a5a4fa8559eb77 SHA-1: 22fea5b5fc93a5b8b5ce691133e96caf1286caca SHA-256: 01662ef54f9049482ab7f52d3e45d18a7f1098c3aece182438c8f257d74d7729
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic identifying it as a link farm. One of the primary links directs to a known malicious redirector, ttraff.cc, disguised with a keyword related to a tourist map. This suggests a social engineering tactic to trick users into clicking malicious URLs, likely for further malware delivery or phishing.

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.cc/pify?keyword=asahikawa+tourist+map+pdf
    • http://files.angelaeastwood.co.nz/uploads/1/3/0/8/130873945/2748865.pdf
    • http://files.riverbarn.org/uploads/1/3/0/7/130739404/fc71835f2.pdf
    • http://files.indianheadsheepandgoat.org/uploads/1/3/2/7/132712127/xebale_mepukodatavo_vifet_xifegapipixot.pdf
    • http://files.pamsteashoppe.com/uploads/1/3/1/3/131384789/59b03f6f49c09c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/green_energy_technology.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/21969884811.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/pufaguwupufifiguj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/77922908709.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/45559573256.pdf
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/calculus_a_complete_course_8th_edition_adams_and_essex.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4884/files/99851634809.pdf
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/rekuvi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0209/9873/files/9950910813.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/33749361295.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/92899454893.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/fetipepodagel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000949f.bin
d32f8a5ebcc14d38de85620d995b3c1122e945719b9111d465a612088b6d11e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x949F 4068 bytes
font_01_sfnt_off0000a2f0.bin
5910a285c05060cb32aca74101179368aa2607b1e85ceeac68c97ec1eac859aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F0 5396 bytes
font_02_sfnt_off0000b533.bin
6644368cee8e3ef30da0585edd0faaa74744ee600a5184748c8688ff14bd4acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB533 10060 bytes

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