Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc11e3a0b89a7e6…

MALICIOUS

PDF

54.9 KB Created: 2020-09-07 14:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: debd242fcbd25426400502300432e216 SHA-1: 824b6f1e3bfcdfe496378759a1a28d5c741bd80f SHA-256: 9bc11e3a0b89a7e673220719922820a5945913ccabea5842904fb8fb5949e24e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me', which is used to lure users to potentially malicious content. Additionally, it exhibits characteristics of an SEO link farm, with numerous links to external PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the redirector URL and several Shopify URLs, reinforcing the link farm tactic. The primary intent appears to be driving traffic to the malicious redirector through a deceptive link farm.

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.me/wix?keyword=3d+parallax+background+hd+wallpaper+free
    • https://cdn.shopify.com/s/files/1/0438/3490/0642/files/black_and_red_4k_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/parokobegujibopiporejopi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8746/files/gay_video_chat_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/5591/4908/files/multiplying_and_dividing_negative_numbers_worksheet_tes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/41754195422.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/madoser.pdf
    • https://cdn.shopify.com/s/files/1/0470/8735/4014/files/rorimuxipajonutusuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/serotonin_syndrome_patient_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/devexpress_web_report_demo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/dinezoler.pdf
    • https://cdn.shopify.com/s/files/1/0429/4279/1839/files/pure_and_untouched_barbara_cartland_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/8738783165.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/belt_and_road_initiative.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/vedusiwugabofi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/mirupudorixefamak.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/yandere_simulator_free_steam.pdf
    • https://cdn.shopify.com/s/files/1/0438/3624/4118/files/90713882399.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea3.bin
429e5f108705f77b530413b9135f6f6952e06aa5884ffd89a76d11ea36ac131a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA3 6980 bytes
font_01_sfnt_off00007075.bin
a02a6c2d3eaf87e570e7f863d095942cc4e230d75f37f61058cf520eaa39c1f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7075 5672 bytes
font_02_sfnt_off000083cd.bin
0ee854a24b89f7ee8570bbc505c50a6667f3068117e125e0485dee6a0a160261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83CD 2504 bytes
font_03_sfnt_off00008eb4.bin
1bd18e85cabdb4b69fe26ab8329f75d783947b6a4113c2cf672a626ffe14c586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 10904 bytes
font_04_sfnt_off0000b3f2.bin
d0df18c6e9964cbb4f23b71e2f3a493e77a3e525010856f81223d891aceaa173		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3F2 17080 bytes

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