Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60a2bedc302dfe5…

MALICIOUS

PDF

42.5 KB Created: 2020-07-30 20:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f327be14bbbd9e23664b433de5402af SHA-1: 19a3b8430ecebbbb316a40e392cd09dce07d7854 SHA-256: a60a2bedc302dfe5bff2ae81107ff662a473f54248af9d03cab018025705dd67
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains keywords related to a 'keto diet plan pdf', suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute the malicious payload. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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.cc/pify?keyword=keto+diet+plan+pdf
    • http://files.mammausa.org/uploads/1/3/0/7/130776327/gemike_relovuzewufos_rodijesufale.pdf
    • http://files.jwpcc.org/uploads/1/3/0/8/130874585/7f8ae2d90.pdf
    • http://files.tartancanvas.com/uploads/1/3/0/7/130738949/5913395.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/12699956514.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/17794227056.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/16343236153.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7049/files/gukudimonabowonipumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/77612527027.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/10925443644.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/57791949698.pdf
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/folokid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/farekopexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/24956212904.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa4.bin
d4ee564058474058b0391083e804331e803bc03665c79e4fee22fbb3c99d341a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA4 4516 bytes
font_01_sfnt_off00007a12.bin
cec48777d76d1ab9e5ce576f57628fec1afc341c1a851b5386277e4d4087269d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A12 10276 bytes