Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dde605e15a4ecac…

MALICIOUS

PDF

39.5 KB Created: 2020-08-23 06:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa97ceb4a669c00484b7e53113233d28 SHA-1: 954ff860fa3f0cd83bafcda4c5ff86026511a18d SHA-256: 7dde605e15a4ecac90c2f8e324961b9e6620d5de46c5cfbd327e382b873f1fbc
150 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, ttraff.com, which is used to lure users to potentially malicious content. The document body contains a movie title and the wkhtmltopdf application name, suggesting a lure to pirated content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ann+maria+kalippilaanu+full+movie+online
    • http://bujumo.genesfoundation.com/uploads/1/3/1/8/131856033/1837597.pdf
    • http://files.solentfaa.co.uk/uploads/1/3/0/8/130874526/ae1034a5.pdf
    • http://files.virginiagraynovels.com/uploads/1/3/1/3/131384436/ranexekogofefano.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/bluestack_window_7_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/difference_between_conductor_semiconductor_and_insulator.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/41542044972.pdf
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/adobe_illustrator_10_windows_xp_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/9722/5368/files/97745580163.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/durufipukebesenox.pdf
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/lebutamud.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/wijuxenixiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/curso_de_adestramento_canino.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/igcse_biology_drugs_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/34613212007.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/53788135860.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/87889886272.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f12.bin
798719160c38ff9eab93cb6c3307a034882a9e00c4567f85bdd2ecd8f8c4440e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F12 4784 bytes
font_01_sfnt_off00005f36.bin
263314bfe469a92b65e0c4eedf8867974549c278700fa6746439956786a594f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F36 10380 bytes
font_02_sfnt_off000082a8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A8 4324 bytes