Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac983edfc700da1a…

MALICIOUS

PDF

45.2 KB Created: 2020-07-26 01:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6d09f3ae31caa05443074c8db52748a SHA-1: 803f39dd6a1a6a38f0a5726d0f063ac1ba1b604c SHA-256: ac983edfc700da1a779b104633898d6ea24318514d0c6b6578b0b9cc94c1248f
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One of the primary links points to 'ttraff.com', which is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Autoptimize wordpress plugin' and 'wkhtmltopdf', suggesting a lure to attract clicks. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=autoptimize+wordpress+plugin
    • http://files.unlimitedpotentialaz.org/uploads/1/3/1/6/131608016/9798056.pdf
    • http://files.wavesofwords.org/uploads/1/3/1/4/131453651/fowidowegu.pdf
    • http://files.dp-art-gallery.com/uploads/1/3/2/7/132710797/nirumox.pdf
    • http://files.scottrobesoncustomwood.com/uploads/1/3/2/6/132695596/13ef5581e7b94.pdf
    • http://files.scottrobesoncusto
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/vivewegone.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/91505765947.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/96673597925.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/ruwakoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/74131241612.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/zapojemafafop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/gamijazitukelokefamovigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/21883651849.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/66907540121.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/jizujulexakafisun.pdf
    • https://cdn.shopify.com/s/files/1/0433/3587/6776/files/79997547636.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/gekonisawe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/mefabozupijob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38664456414.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_off00007427.bin
08265ace2795c5e602c8848b09329131df5f57d4ea8c06d4147bcfa5a4689ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7427 5084 bytes
font_01_sfnt_off00008570.bin
023bd64cc73a21f5b7172a056995ed1db5c0ce6a74b50c48aadbaebd263a858a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8570 9984 bytes

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