Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a834b9a1ff4f3a…

MALICIOUS

PDF

73.0 KB Created: 2020-07-22 21:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07b3087dddd84df85c1e39736f76d32 SHA-1: 7256cba25c0211cd6561766e08b438b4be5573d2 SHA-256: 61a834b9a1ff4f3a184ec01a3d09ef60a0dbfe3e23871acbb71d2a6d9d1f7e53
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'general systems theory pdf'. The presence of many external links suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/wb?keyword=the%20history%20and%20status%20of%20general%20systems%20theory%20pdf
    • http://files.gamblingproblemhelp.com/uploads/1/3/1/4/131453615/9819880.pdf
    • http://files.catholicapostolatecenter.org/uploads/1/3/1/8/131872017/vazika.pdf
    • http://files.nailahsshea.com/uploads/1/3/1/3/131379951/vuvilenepebebepiw.pdf
    • http://files.dancetodaybiz.com/uploads/1/3/0/8/130873718/7757570.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/2716066315.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/fesoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3302/files/zejonewu.pdf
    • https://tajewifaxeri.files.wordpress.com/2020/07/daniwuwozerazupixubo.pdf
    • https://mikupekuforu902814454.files.wordpress.com/2020/06/lowosopa.pdf
    • https://dupowoso.files.wordpress.com/2020/06/pabumeridusofokupotu.pdf
    • https://wivatog908722910.files.wordpress.com/2020/06/furodugikakalisejufojaji.pdf
    • https://potataz.files.wordpress.com/2020/07/82847794083.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vazakiliduvapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/9429919873.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/fogavubejuwotebuvek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaxesajikibulunetegidu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/vegokeligozapulagakugax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3865/files/datitupigofobuputaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4993/3208/files/zogejamen.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_off0000dfed.bin
1e084f7e195cb2dd3458fd82cde736eeeb65589155ef06648e820739d1b8015b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFED 5388 bytes
font_01_sfnt_off0000f21b.bin
bb326ba19cced2f1b1bc22f2268ac9265c9acd2231babd8194fb99239eb72a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 10396 bytes

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