Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3db792ea0a7985…

MALICIOUS

PDF

37.5 KB Created: 2020-08-27 19:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 361ad2b60f9ca4a39ab323eddaa6d4a3 SHA-1: c1af853c941555fcecc47b7de579b980e6b74bb9 SHA-256: bc3db792ea0a798581f623400d01aac1f475a2735d81ad21273520a9cf1eba8e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though partially corrupted, contains the text 'Amityville: the awakening torrent' and the malicious URL, suggesting a lure for pirated content. The presence of numerous other PDF links, many hosted on shopify.com, indicates a link farm strategy. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=amityville%25253A+the+awakening+torrent
    • http://vawuze.heartburstman.com/uploads/1/3/2/3/132303035/rajalesibuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/ferudevujurebetemadosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/zazilogupilak.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/53496996634.pdf
    • https://cdn.shopify.com/s/files/1/0450/8326/3141/files/capital_market_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0437/8663/3374/files/minions_desktop_wallpaper_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/3_year_cash_flow_projection_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/rurosuzofadubit.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/zamakewo.pdf
    • https://cdn.shopify.com/s/files/1/0448/5795/0370/files/72727791582.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/fesijosegakifawivin.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_off000053cb.bin
e0a04a4d3a2861363b01e2dc3ce3bd625722b30b5888d35aa2514a062fbf9eab
pdf-font-stream PDF embedded font (sfnt) at offset 0x53CB 5276 bytes
font_01_sfnt_off000065b4.bin
54a01eb4521ce9e499f742431ede423fb4474eadceec94509d734d33abdc14a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B4 10468 bytes