Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b8308020e9a4872…

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 10:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdb0396523bda71093945ec3984679d5 SHA-1: 3b93c9f9c14703ec439be12bbb237bbf6e96f212 SHA-256: 4b8308020e9a487273980a8cdb7eac667eb6c4e2052263e9fc1331975d68e466
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, with a query string suggesting a lure for free Bollywood movies. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same lure text and URLs, reinforcing the malicious intent. The presence of numerous external links, many pointing to Shopify domains hosting other PDFs, suggests a link farm or redirection strategy.

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=mobile+movies+free++bollywood
    • http://files.johnzwoodworking.com/uploads/1/3/0/8/130813988/252ad49d979.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/fofizererifive.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/pirate_bay_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/75646625349.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0439/3231/9912/files/ashrae_55_thermal_comfort.pdf
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/algorithms_and_data_structures_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6667/files/gmc_repair_manual_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/xigijoketujanuregiwabosa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7592/8215/files/kumopotupisanudesewu.pdf
    • https://cdn.shopify.com/s/files/1/0462/2768/5525/files/balamani_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/76533063057.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/lakoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/instagram_post_template.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_off00005acc.bin
8ad41434d41a39d8e43d09a6c1dd53b0b5488cae51ff8166a1f14cbdbf5c21eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 5244 bytes
font_01_sfnt_off00006cac.bin
4b954de53f18af92e81c3058dd69d12e391950cb61cd88b062e140b02edc19b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 14336 bytes