Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e205cf1c728f85…

MALICIOUS

PDF

38.2 KB Created: 2020-08-24 02:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd429f24f40769f058771beaeaf6dd04 SHA-1: 32c28ae6d4b062eaadb2f49e187919a749956afb SHA-256: c3e205cf1c728f8592cc35452b79060979c3ccd8464985466557d1f4906c3491
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, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, contains the same malicious URL. The primary attack pattern involves luring users with seemingly educational content to a malicious redirector.

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=fraction+number+line+worksheet+answers
    • http://sexenolag.aperturedelta.com/uploads/1/3/1/6/131606490/gokuvegikulewelolage.pdf
    • http://files.bettingonasecondchance.com/uploads/1/3/0/7/130775292/2518311.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/como_aprender_coreano.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3171/files/lotto_shoes_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/76417066136.pdf
    • https://cdn.shopify.com/s/files/1/0460/1351/3889/files/long_time_ago_in_bethlehem_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0461/1388/2275/files/cafeland_0._9._46_hile_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/bollywood_music_instrumental.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/aluminium_properties_and_uses.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/73876443435.pdf
    • https://cdn.shopify.com/s/files/1/0435/4736/1439/files/bringing_down_the_house_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/bluestacks_whatsapp_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/sociologia_juridica_unam.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/56236260995.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_off000057b9.bin
9d27e13fe97b790d6d75ef56871dc2f2d775735049c635ac6ef22af1760f2124
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B9 5292 bytes
font_01_sfnt_off00006997.bin
03fbb1d9e50c0c80a557445672f5450517d8b975b7f3c90d2f2cd37f253e20de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6997 10072 bytes