Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41ed5ca0d2ed3a8…

MALICIOUS

PDF

49.5 KB Created: 2020-07-22 21:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea10e57ae237e6440b52a2e9e2f2da3 SHA-1: 85870a41b1201ee66c91d7281ce5eac5b183b1d1 SHA-256: c41ed5ca0d2ed3a8d751c7610c61c6de03a4c352ad087b36db6e63d003f26c16
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Toyota dashboard warning lights pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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/wb?keyword=toyota%20dashboard%20warning%20lights%20pdf
    • http://files.rioxpvista.com/uploads/1/3/1/6/131637034/36c763c9765.pdf
    • http://files.iwilk.com/uploads/1/3/0/8/130814735/xisepuvafimakoze.pdf
    • http://files.senaonmyrtle.com/uploads/1/3/0/8/130874141/40b46fd947c.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/xifutonutetomaparev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7776/files/75912908335.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/62900586212.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/pamugesinugepomefumideles.pdf
    • https://mosutag880995420.files.wordpress.com/2020/07/lipenesegasebopibo.pdf
    • https://relofeziton.files.wordpress.com/2020/07/33021737632.pdf
    • https://sudulinu.files.wordpress.com/2020/07/59505014935.pdf
    • https://zolibuvove523289473.files.wordpress.com/2020/06/netubodojowupod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/9735298409.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0305/files/19834638088.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/81034778123.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/40271892141.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/51625897224.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/39509309534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/tobetefel.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/
    • https://mosutag880995420.files.wordpress.com/2020/07/lipenese

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000847f.bin
d0bda65ba1a239bcd4819e417ea906b4657ff81a9cdb8c9ee7c00f4afed3ca55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 5256 bytes
font_01_sfnt_off00009661.bin
6cbe0bb57e4677ba7c81e0a43fd9939ec214d25e553cf26554388e7440c9bc93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9661 10008 bytes

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