Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea58dde1d06b2605…

MALICIOUS

PDF

40.5 KB Created: 2020-08-01 04:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f89bcf2eeca5150c768b15cd336dc65d SHA-1: f76d1a296d3142ee3bb7bb39bc9ba71177b0c2eb SHA-256: ea58dde1d06b2605c10ee1daaa15d830fe5e43f4f7e02bae75908ce54a02f15e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=on+golden+pond+quotes'. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. 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.ru/pify?keyword=on+golden+pond+quotes
    • http://files.imaginationplayhousesf.com/uploads/1/3/2/7/132741136/8064822.pdf
    • http://files.uccststephens.net/uploads/1/3/1/3/131384709/dokep_wobamoxasogokub_lisonuxefube_parokuzu.pdf
    • http://files.issl.space/uploads/1/3/0/7/130776561/vetifijus.pdf
    • https://cdn.shopify.com/s/files/1/0427/9658/1020/files/wowonokero.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/zonix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7810/files/89942003623.pdf
    • https://cdn.shopify.com/s/files/1/0437/7654/0834/files/papofupado.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/lifemogifivekodu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5584/8355/files/96800100407.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/gigagogapolusutuzakixeko.pdf
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/62168562732.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/68445351039.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_off00006260.bin
3e6d4fe8fb16367606e83cde7a4aca74428294ee0af1a5e4fd540e6770f90c10
pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 4976 bytes
font_01_sfnt_off0000735a.bin
9485e98bf65274cd9a4d4c39bf14944e60ba55a5847216870ebddf8b84d367cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 9964 bytes