Malicious PDF — malware analysis report

Static analysis result for SHA-256 f500e1186e82b1d6…

MALICIOUS

PDF

51.4 KB Created: 2020-10-27 03:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 363baae2286921101ef265b5dcf0f0e5 SHA-1: d7c14cc6429936ab906a45d390372bcc7deb2e81 SHA-256: f500e1186e82b1d6843368a0200bb8a1604cd31215bf5784538e932452ccb148
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to redirector infrastructure and link farms, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded URLs, such as 'https://ttraff.club/123?keyword=molar+mass+of+ccl4', are likely used to direct users to malicious content or further phishing pages.

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.club/123?keyword=molar+mass+of+ccl4
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/a0fc8.pdf
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/274845.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdf
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/tumesur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/31d7894b-7cab-48bb-a644-7602bb3d52b3/bosigakupunego.pdf
    • https://uploads.strikinglycdn.com/files/db160f06-e8bb-4d91-b343-e08363607ac7/66436335909.pdf
    • https://uploads.strikinglycdn.com/files/6e532189-3b1c-4f29-97f4-40f35daf0d51/91696418133.pdf
    • https://uploads.strikinglycdn.com/files/b269b880-3a05-4b73-b145-74697983792f/12898941315.pdf
    • https://uploads.strikinglycdn.com/files/4a0b32d4-1c27-4809-b8a7-34cccd74ee41/bunomowibode.pdf
    • https://cdn.shopify.com/s/files/1/0266/9153/5018/files/codex_space_marines_2020_vk.pdf
    • https://cdn.shopify.com/s/files/1/0483/9666/4989/files/pofavirezopebugubal.pdf
    • https://cdn.shopify.com/s/files/1/0482/8400/8603/files/8087451608.pdf
    • https://cdn.shopify.com/s/files/1/0266/7862/4426/files/realistic_htx-100_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/60253649793.pdf
    • https://cdn.shopify.com/s/files/1/0434/4548/5725/files/links_awakening_guide_ocarina.pdf
    • https://cdn.shopify.com/s/files/1/0499/6494/1480/files/consider_the_two_systems_s1_and_s2.pdf
    • https://uploads.strikinglycdn.com/files/96d59f8c-b063-42ff-a203-6c3cc5307bb9/nejimivoduxikatofavafa.pdf
    • https://uploads.strikinglycdn.com/files/d6dd8662-c8d1-426b-be06-6b10b7e4a4c2/76473558641.pdf
    • https://s3.amazonaws.com/zuxadol/lodekazanaluvi.pdf
    • https://s3.amazonaws.com/leguvefu/38963627321.pdf
    • https://s3.amazonaws.com/mexavofezoxi/amino_acids_peptides_structure_and_classification.pdf
    • https://s3.amazonaws.com/vaxebisapesi/bizowegu.pdf
    • https://s3.amazonaws.com/gadumagabusodel/multicultural_literacy_definition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081ff.bin
8752028933529d8e305c6300446a7b6c1ef7020b67f9d02e894653c9d5a521f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FF 5120 bytes
font_01_sfnt_off0000935b.bin
31901f1d26148bce523619cf8e9d7660a9b2305ca18893e84486ef07f2c87b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935B 14600 bytes

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