Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85ee48e31cec7e2…

MALICIOUS

PDF

52.9 KB Created: 2020-08-09 22:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33902242ab5320292cc9b22bf79b4185 SHA-1: 60968c57686b12a90b6ff360e95de5b7566a2ada SHA-256: c85ee48e31cec7e2a048319dff2999226dd10f4b0eeee1b1a56d23d24eaa85f2
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one of these links directs to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body text appears to be a lure related to 'seventh day adventist medical missionary training pdf', likely to entice users to click the embedded links.

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=seventh+day+adventist+medical+missionary+training+pdf
    • http://files.countryclubofgreenvalley.org/uploads/1/3/0/7/130776449/bagomewet.pdf
    • http://files.mrncleaningservicescom.com/uploads/1/3/0/9/130969680/kosumexab.pdf
    • http://rawezar.gogaphotographylondon.com/uploads/1/3/2/8/132814930/604f4b394fe3a0d.pdf
    • http://files.tctexasbaseball.com/uploads/1/3/0/8/130874029/969458.pdf
    • https://cdn.shopify.com/s/files/1/0448/8462/3527/files/low_alloy_steel_grades.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/bejixemon.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/92664517131.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/animisme_dinamisme.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/33034320339.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/volabejukisukujaxisudefor.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/faux_leather_repair_kit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/tesun.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/modele_d_attestation_de_stage.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/97686327543.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4996/files/gapekosipoferepani.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_off00008e62.bin
9205153850b2fd73485394732e502a8252a5b83674e86b9e8d909af8d6ae35a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E62 5832 bytes
font_01_sfnt_off0000a223.bin
a8749971d52e0ee914e0cf4ddec7bcbd8aa24a33781ef0e5e85a183dfbd899e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA223 10456 bytes

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