Malicious PDF — malware analysis report

Static analysis result for SHA-256 00495c7d84dba2eb…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 01:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1db565ce14a1b6ec32cb5dbca90b25 SHA-1: 0e0d28cc62da38dae292b3f944acf1b336d1a55e SHA-256: 00495c7d84dba2eb3fbbeebbd1022e49e6b3809a899fad93c6d93b357bad1259
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Padma shri award 2020 pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated 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=padma+shri+award+2020+pdf
    • http://files.unofficialkaleo.com/uploads/1/3/1/6/131607075/nalozexowar.pdf
    • http://wajifowag.tompetteruti.com/uploads/1/3/1/6/131637649/mejibevaxe.pdf
    • http://files.arroyooakshoa.com/uploads/1/3/1/6/131607733/kerimunes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/99396938912.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/65746000977.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/initialize_2d_array_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26384136461.pdf
    • https://cdn.shopify.com/s/files/1/0438/5826/4229/files/johnson_controls_a419_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/forest_animals_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/pathophysiology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/atmel_studio_6_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/kitchen_sinks_lowes.pdf
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/12141597575.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/mukutaxed.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/82331379056.pdf
    • https://cdn.shopify.com/s/files/1/0440/7322/2294/files/zilopin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632b.bin
a0236e63eba57a1e092c4055c65b9f5803322b655ab420ae99611f3b64bd7b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 5616 bytes
font_01_sfnt_off0000762e.bin
ddf4e3adfd9f9be1918120c71018ca6a64b40ffd964c595e8ef14c52a6c1b382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762E 14192 bytes

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