Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc91c1e8028c2ba…

MALICIOUS

PDF

39.3 KB Created: 2020-08-27 18:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4dd714a322eee9a45845804f1e2f1af SHA-1: 9b4654a5e249477100565fe16dee8a55f1698803 SHA-256: dfc91c1e8028c2ba8d950c116435f3cf93aee8acfbe3724318939aa781c73e55
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.cc/pify?keyword=garmin+dezl+760+manual, which is likely used to deliver a secondary payload or phish for credentials. The document body, though partially corrupted, contains references to this URL and other benign-looking PDF links, suggesting a social engineering lure.

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=garmin+dezl+760+manual
    • http://files.phloxdivinity.org/uploads/1/3/0/7/130776180/mokis.pdf
    • http://files.lagarrigue.co.uk/uploads/1/3/2/7/132710763/3adbc4340f.pdf
    • http://files.pd-parenting.com/uploads/1/3/0/9/130969999/bexulogewilelasetiza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0434/5525/0598/files/39018563279.pdf
    • https://cdn.shopify.com/s/files/1/0435/6086/1845/files/calculus_for_scientists_and_engineers_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/pibuzapoxupegadefutukadev.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/71923751571.pdf
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/35065675342.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/29449173540.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/sosuwadejuberazosemuj.pdf
    • https://cdn.shopify.com/s/files/1/0447/4231/2085/files/losevumudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/gukut.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/74942918730.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/20671282552.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_off00005a87.bin
b904f94dc9135875d60b3bea7f465de22b8cefbf745f057edbf2333e4380310e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A87 5248 bytes
font_01_sfnt_off00006c55.bin
5aac70c26e489632dc4f9f1c89a3783eac9d7c89099247480e11c4c00c7d9ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C55 10660 bytes