Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b9e10055542b5d…

MALICIOUS

PDF

48.5 KB Created: 2020-07-28 04:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf9c1da0f1e776ba07c67cadeadaea99 SHA-1: ae13a541b1ae9b4b3908a7f5ab106e542fd5cd4b SHA-256: 87b9e10055542b5d66cbee681bff83a68714a30c82cc0c6e85a0676c40d4b4de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.com/wb?keyword=aeronautical%20information%20manual%20easa' leads to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content from various sources. No scripts were extracted, but the presence of malicious links points to a phishing or malware distribution attempt.

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/wb?keyword=aeronautical%20information%20manual%20easa
    • http://files.southerncrosslinedance.com/uploads/1/3/1/1/131163867/70ff9ad.pdf
    • http://files.kdrose.com/uploads/1/3/0/7/130740502/lukunixugeze-gajiviri-zezulolatapepi-tugupemo.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.vineyardranchpta.org/uploads/1/3/1/4/131438538/volijajojo-naninedomolevum.pdf
    • http://files.gncwomen.org/uploads/1/3/1/6/131606923/wetopir_jogegajitiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/93037296186.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/85262088141.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/11628861423.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/7032570744.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/soreludafawuzasovipanoxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/57270879742.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/93129093448.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/zigituzufetinam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/fimenetepavup.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/18249945730.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/60183459366.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/wozipalegidupisub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/50692652604.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4e.bin
e7f07c3a7ba239a89966f6db3640dbc1b5747b15286c1833c6284978681ff8b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4E 4900 bytes
font_01_sfnt_off00007dd2.bin
ca0dc526833c68de32799c6fc7b2265040f4229644d0ce9785954204b4973eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD2 9764 bytes
font_02_sfnt_off00009f69.bin
4471f92216f50ed59660dfde07325d7bc7936b356a877ae20405b399f7876638		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F69 16060 bytes

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