Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edc81830859ced5…

MALICIOUS

PDF

49.1 KB Created: 2020-08-24 13:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7c0b32f75ebebdb5d90d2dc1cbc3159 SHA-1: 25d652ed6a57dbfde2a541ebc84c5af3306dc996 SHA-256: 8edc81830859ced511a5f363e2b98b1938672323fe902829f8af5823381a8623
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to mimic search results for a 'cissp book pdf free'. The primary malicious link, https://ttraff.cc/pify?keyword=cissp+book+pdf+free, redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other links to Shopify domains, suggesting a phishing or scam attempt.

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=cissp+book+pdf+free
    • http://files.magicmudceramics.com/uploads/1/3/0/7/130740462/c3a76e7c0d8.pdf
    • http://files.alohachapter99s.org/uploads/1/3/0/7/130776246/d2a8831be.pdf
    • http://gebifopim.accruemineralsltd.com/uploads/1/3/1/0/131070314/d1f051.pdf
    • http://ritere.neilmckenzieyouthfishingcontest.org/uploads/1/3/2/6/132680955/rekawakaleje.pdf
    • http://files.bentnotbrokenscoliosis.com/uploads/1/3/0/7/130776393/livuti_favelinuvejo_luvobiduzunome_wipizewifadik.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/monigegupisakukonoginonax.pdf
    • https://cdn.shopify.com/s/files/1/0450/8627/7784/files/sikojani.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/neximupanorilugipopizufum.pdf
    • https://cdn.shopify.com/s/files/1/0435/3101/0199/files/4716167828.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/40448236351.pdf
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/dagokivivupitemerupoxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/search_inside_yourself_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/guzira.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/verbe_avoir_et_etre_au_present.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/jajisedekivugejumasas.pdf
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/guxefegegagizak.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_off00008304.bin
3005f0c0dff13fa9bc1598ced32eb23e089ea0fa80c843410a83bd76501982fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 4904 bytes
font_01_sfnt_off000093bb.bin
2ceccdb7b22a945b18477d848749f8c390bfc7c2d988afc7fb4da40af4e37394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BB 10360 bytes

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