Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcc0f750fb4ae9d…

MALICIOUS

PDF

68.0 KB Created: 2020-08-05 21:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4267679edeccdaacac60cd5500b712a SHA-1: 61ea39e0625105fde634efc9001a97d5a0718dfe SHA-256: 0fcc0f750fb4ae9db9e2a3e1329dcb4ca340398c2d4614afef2db33c95ba804e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDFs, indicating a link farm or SEO manipulation tactic. One URL, 'https://ttraff.cc/wb?keyword=adosphere%201%20pdf%20vk', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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.cc/wb?keyword=adosphere%201%20pdf%20vk
    • http://files.alainolivier.ca/uploads/1/3/1/4/131406288/difepopir.pdf
    • http://files.bellasapothecary.com/uploads/1/3/0/8/130814226/motem.pdf
    • http://terivufur.skinbyame.com/uploads/1/3/1/8/131871478/8151c40e3b024.pdf
    • http://files.rosehillplayers.net/uploads/1/3/2/3/132303077/dabifu-sezik-podepubusijumi-tirapafubexo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/legiruvunuwaserexog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lutekalejore.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/15408410684.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4409/files/xusife.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/22029623410.pdf
    • https://cdn.shopify.com/s/files/1/0446/9896/0026/files/how_to_create_a_discord_channel.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/ask_mr_robot_addon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/nitonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/tetorazavejuguxol.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/45602050689.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/repusifamosixunalizine.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/pukiwokonafidagomusowite.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/tamil_language_learning_in_english.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0e1.bin
5b6c394b849915daf270b0a1f8cf83c3ad24b7ab3d6bfa9374c11f14e24f5de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E1 4608 bytes
font_01_sfnt_off0000c09f.bin
589abfdbc017ecf013f43eddf7af4810c3ef076300a7b510b8cb46b3704be9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC09F 17520 bytes
font_02_sfnt_off0000f396.bin
781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.