Malicious PDF — malware analysis report

Static analysis result for SHA-256 a469040710076eaf…

MALICIOUS

PDF

47.4 KB Created: 2020-08-03 12:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26755a3e99ef876ec28e562ed972a362 SHA-1: 8ab862433d9d3f7061ab6d126ebcc79a7341079e SHA-256: a469040710076eafd5f30e5f500865f461e89d456db356375c7c3997f69e6c19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm technique, embedding numerous URLs that point to various PDF files, likely to manipulate search engine rankings or distribute malicious content. One of the primary links, 'https://ttraff.com/pify?keyword=sony+5100+manual+pdf+espa%25C3%25B1ol', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same malicious URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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=sony+5100+manual+pdf+espa%25C3%25B1ol
    • http://files.honeyandsagedesigns.com/uploads/1/3/0/7/130775108/soledam-litupekirasim.pdf
    • http://files.mrgibsonsvhs.com/uploads/1/3/0/9/130969254/5bdc26.pdf
    • http://files.midamericaallianceforafricanstudies.org/uploads/1/3/1/3/131383342/pudesuzupofazofuzan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/2482674842.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/gudobolurote.pdf
    • https://cdn.shopify.com/s/files/1/0436/0116/6498/files/baxiwawaxabapigov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/fagagajimilirefakez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/paper_clip_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/4919/7472/files/smokey_bones_nutrition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/tojomolinafexawabipab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/dipemapiguzijubo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/search_chrome_history_by_date.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/xajipusavuresofinonibasi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/57789713724.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000549f.bin
d7bea84525bbefdb5850337f7daf5ff5554917552b257dd0afd4411b02ea0fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549F 3776 bytes
font_01_sfnt_off0000622e.bin
80c79a233162888222f4dbbddf29d82196471b335d30316fec9f4e042f3b4820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 5828 bytes
font_02_sfnt_off000075bd.bin
593a452f0795506ac97007ad32b21767cc543cb1bc716fd74108abb5279d52e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 6640 bytes
font_03_sfnt_off0000875b.bin
6fcdb357ac1c818cfd381d22ccecc33374a5651be9fdcf67f128022dcd929514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875B 11672 bytes

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