Malicious PDF — malware analysis report

Static analysis result for SHA-256 855124acc12ebb72…

MALICIOUS

PDF

39.5 KB Created: 2020-08-21 01:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f25b69dd9e049775d842179b1d23ea52 SHA-1: 204bcefc950af7240f553f8a34ef1674e504cf24 SHA-256: 855124acc12ebb72da08b16d7dd79eba9c85532179d7917ce441bf4b09c67b08
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be directing users to malicious infrastructure via the embedded link.

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=jio+rockers+tamil+movies++jio+phone
    • http://files.tgbtgsports.com/uploads/1/3/0/7/130739570/fuxule-disoju-kifapafikewiz-pasitefox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/wiley_cpa_review_2016.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2635/files/rizilofarebawaxiziduna.pdf
    • https://cdn.shopify.com/s/files/1/0438/6603/0245/files/full_hd_car_wallpapers_1080p_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/vawiwidukitivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/dapuzuruxosivosobuzab.pdf
    • https://cdn.shopify.com/s/files/1/0451/0603/6899/files/aseptic_and_antiseptic.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/rich_dad_s_guide_to_investing.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/traduction_photoshop_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/kozutogomaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/2489/8453/files/31800170601.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_off00005e7d.bin
3f329823d4f38fd95ccde73938d18ce7e0ad1e27477c9a3f121fec31da1cc5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5360 bytes
font_01_sfnt_off00007096.bin
6890147e27ec5f6cdfe1054a0b599609805b1522bf3355584d6815b5669ac74b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7096 9816 bytes