Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4e259d0547f3cc…

MALICIOUS

PDF

37.6 KB Created: 2020-08-23 09:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d634eb184bf42c446474b5f1947eb50b SHA-1: 5f9418e51f17db06670365680dc45f317b1d7ce0 SHA-256: 7f4e259d0547f3cc61864772b92fe3b5d7bf4358270356b93d5257394d11f9c3
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=chocolate+2005+full+movie++480p, suggesting a phishing or malware distribution attempt. The document body also contains this URL and references movie downloads, indicating a lure to entice users to click on the malicious links.

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.ru/pify?keyword=chocolate+2005+full+movie++480p
    • http://tozis.hodaemam.com/uploads/1/3/0/9/130969060/55c2f78a9340ff.pdf
    • http://files.anitagrandt.com/uploads/1/3/2/7/132712080/2276922.pdf
    • http://tawoled.littlebitofheavenadoptionreferral.com/uploads/1/3/0/7/130776054/banizujomodupi.pdf
    • http://files.comfortltc.com/uploads/1/3/2/6/132695646/katafujuwidu_nitigaminizo_fevoliko_baganitav.pdf
    • http://mogasiduw.richardlangchandler.com/uploads/1/3/2/6/132696212/tavijenisovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/lavopiwulixawox.pdf
    • https://cdn.shopify.com/s/files/1/0460/1328/4511/files/jusilofimizifetesog.pdf
    • https://cdn.shopify.com/s/files/1/0440/6404/7269/files/93268953851.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/91976575894.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/wafiparugodivalawetuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3175/5932/files/puzasimi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/90434923198.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/universal_studios_theme_song.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_off0000521c.bin
91d5ab7bf815f344c7eaea591917a72a9e942feb152d89aa885f78a913cf6610
pdf-font-stream PDF embedded font (sfnt) at offset 0x521C 5628 bytes
font_01_sfnt_off00006531.bin
cf890af5c2e07ad07c9b55a1619bf15feb4402e67931fe0ca727aabcd9476b59
pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 10780 bytes