Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aff08860f8cedea…

MALICIOUS

PDF

48.6 KB Created: 2020-08-21 11:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ab249e9f9a4676b394389e6cc10b29 SHA-1: 46aadcf126b9c47f7b50c8508087edd59143ff3f SHA-256: 5aff08860f8cedeaa9f6aa38f971e76592e9904476f188752d52e8c92cb8c929
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector infrastructure, which is a strong indicator of malicious intent, likely for phishing or scamming purposes. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the embedded URL in the document body strongly support this. The presence of numerous external PDF links also suggests a link farm, potentially used to distribute malicious content or improve SEO for scam sites.

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=oregon+state+elder+abuse+reporting
    • http://files.milliganproductions.com/uploads/1/3/1/3/131398236/fivume.pdf
    • http://nujox.fabricsilkroad.co.uk/uploads/1/3/0/7/130775436/nefaderabanegakakif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/suwexusizutedukamuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3277/2757/files/99133223132.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/3364019209.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/89137547625.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/tuduzes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/gazavodinujuxopobalul.pdf
    • https://cdn.shopify.com/s/files/1/0450/5151/0936/files/fintech_malaysia_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/devipejanusojib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/65820569574.pdf
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/chokher_bali_story.pdf
    • https://cdn.shopify.com/s/files/1/0429/2237/7375/files/sage_50_accounting_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/7106244306.pdf
    • https://cdn.shopify.com/s/files/1/0450/4892/2270/files/candomble_de_angola.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fda.bin
54ffc47dd8707204ec49f22e4c0dd840269097552d9b95d72310d00b335af764
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDA 5296 bytes
font_01_sfnt_off000091dc.bin
6fa29f4ee0decf6da807cf14156eaa61ad7d3ba15d95514820d2a8d5b166e300
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 10304 bytes