Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0f72e7d797327a…

MALICIOUS

PDF

52.3 KB Created: 2020-10-23 06:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90845d9990a416f903b952aedfd4d46e SHA-1: e4a11067991fe9e2a542889d08fb796e79b6cbfd SHA-256: be0f72e7d797327a33cbcdb25745026919fdebef30ccec4d4296f057c162ac93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a clear lure for a 'robux generator' and embeds multiple links, including one to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a malicious redirector, and PDF_SEO_LINK_FARM indicates a large number of outbound links, suggesting a link farm or spamming operation. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?keyword=robux+generator+apk+no+human+verification
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f912a2e79781.pdf
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5f914eb1252be.pdf
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f89703cd715a.pdf
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f884979bc66b.pdf
    • https://cdn-cms.f-static.net/uploads/4385207/normal_5f8d1aacb46a5.pdf
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f8e3e56f1e5d.pdf
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f8ed6eb77c23.pdf
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/7696805.pdf
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/lodaxevizisufuvaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/kubovarevoxa.pdf
    • https://cdn.shopify.com/s/files/1/0484/6996/7013/files/wechat_application_download_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0468/3363/1425/files/digital_certificates_explained.pdf
    • https://cdn.shopify.com/s/files/1/0498/5412/0103/files/76096502415.pdf
    • https://cdn.shopify.com/s/files/1/0498/9127/9030/files/zewozawojulutitodevilut.pdf
    • https://cdn.shopify.com/s/files/1/0266/9399/2640/files/19506716090.pdf
    • https://cdn.shopify.com/s/files/1/0476/1452/5596/files/96150232903.pdf
    • https://cdn.shopify.com/s/files/1/0481/4694/0065/files/15827140638.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3990/files/puzzle_and_dragons_z_monster_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7853/files/bojozobevofozu.pdf
    • https://s3.amazonaws.com/memul/bulleh_shah_biography.pdf
    • https://s3.amazonaws.com/subud/45819715906.pdf
    • https://s3.amazonaws.com/zuxadol/81981027255.pdf
    • https://s3.amazonaws.com/zarelusipofox/fusuremutotosanawawomob.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007368.bin
996369bc989dffb6f09e7748810d510fc59758823a6b7b0863d588180fde14b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 5440 bytes
font_01_sfnt_off000085c6.bin
6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C6 2092 bytes
font_02_sfnt_off00008f6c.bin
5c91d3ed9ec0eb0ad5b983926224d729470cd4c03fec49a8b14475aeeabbcd33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6C 11380 bytes
font_03_sfnt_off0000b495.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB495 4324 bytes

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