Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3ef4251aa2c537…

MALICIOUS

PDF

42.2 KB Created: 2020-08-02 06:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 344668e3c33ee0e1e23d2e72e6dadfc7 SHA-1: c960822834fe498878faa07dda24a8ca240216e8 SHA-256: ae3ef4251aa2c537aeca126a69c3daf847e0ef745aec4b6e16dd10603f9dd7c2
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though obfuscated, contains text related to a '2006 vw jetta manual pdf' and the malicious URL. This indicates a lure to a malicious site, likely for further payload delivery or phishing.

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=2006+vw+jetta+manual+pdf
    • http://files.premiercleanoutspecialistsllc.com/uploads/1/3/1/3/131380612/4133551.pdf
    • http://files.lenasboutiqueofsweets.org/uploads/1/3/2/6/132695636/wikemezojin.pdf
    • http://files.theoptimalageingprogramme.net/uploads/1/3/2/6/132681479/2608561.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/dekogivemofuwipukego.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/65018108884.pdf
    • https://cdn.shopify.com/s/files/1/0436/2538/2051/files/71961287926.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/92215268137.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/scotts_spreader_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/86662506829.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/ledotezakipolejoludopeje.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/jubajexizulet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9101/7374/files/tapijinonareju.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/vokarup.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/summon_night_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/turob.pdf
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/82663400789.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_off00006664.bin
f0b54c8fa21923a632dbe277b2d9c72b4d11953041747c6704a7d5a2cc262621
pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 5472 bytes
font_01_sfnt_off0000790f.bin
72b87d0656822ce977a9ae1c68969901252cad97f5b085455c29cef9bdeb508f
pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10300 bytes