Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ba119523c9371b…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 10:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee667072c008d4e7e906b9cac8ec6a4 SHA-1: 51c9143abdca506b221a5bf296c81f7e5060f126 SHA-256: 39ba119523c9371bced1e2a792c6e7bcc7889b021ac0f101617f10e9df44b21f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document body itself is largely obfuscated but contains the primary redirector URL, suggesting the document's purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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=surge+arrester+working+principle+pdf
    • http://files.empirephilippines.com/uploads/1/3/1/3/131380786/3003ae6a76d9.pdf
    • http://files.bluffsplus.com/uploads/1/3/2/8/132815015/lifitopuxunilab-funezij-xojifibexozur-togugadulumewox.pdf
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://files.katescandleco.com/uploads/1/3/1/4/131483108/sugidirabapetaxalase.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/11679376278.pdf
    • https://cdn.shopify.com/s/files/1/0432/1679/7855/files/munokili.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/77222816805.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/54838314807.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/explosion_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0435/3776/0408/files/77703875793.pdf
    • https://cdn.shopify.com/s/files/1/0438/3188/5986/files/toponofasimirarijebija.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7368/files/sample_bash_script_for_generting_replicas.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/kenmore_elite_dishwasher_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/ielts_general_reading_samples_with_answers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/barthel_adl_index_20.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/67022281381.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_off00006724.bin
d647d6ff3a30f9bedf5c21f623ec47eec7d7131fa3a22402c74e312e9d6744dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 5580 bytes
font_01_sfnt_off00007a45.bin
65ebd828f365bd677d196f4ec185b1f7f26ba6a0d005d9cfb914df8bf5967437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 9668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.