Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7c82853e042a90…

MALICIOUS

PDF

53.9 KB Created: 2020-08-07 19:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de6736e372dd265dbfd88f528dcaf50 SHA-1: cbcbe8e5176b89436b5bebffecfd0efb96998a57 SHA-256: 5f7c82853e042a90b79d94e67a93da51faf240e3e5f7f59b71b11234069b7a94
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=sahih+al+bukhari+download+pdf', suggesting a lure to download content or proceed to a malicious site. The presence of multiple external PDF links indicates a link farm strategy, likely to improve search engine ranking for malicious content or to distribute further payloads.

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=sahih+al+bukhari+download+pdf
    • http://files.rochesterelementaryband.com/uploads/1/3/1/0/131071308/lubudakabokaz.pdf
    • http://bibosume.promisewed.com/uploads/1/3/2/8/132816066/e5ab4b.pdf
    • http://files.deerogersdesigns.com/uploads/1/3/1/3/131384127/3392785.pdf
    • http://files.middleagemiracles.com/uploads/1/3/0/7/130775934/basoveruzu.pdf
    • http://files.seestheticsinstitute.com/uploads/1/3/1/4/131438501/f359358341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/netubujulemanigegapivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/86968650978.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/pubepir.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/18810840760.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/9757607585.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/ferepizenuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/verasadexisezogalim.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7383/files/22642244184.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/huawei_warranty_card.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/famojuxotajarovamidiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/95538836392.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000939e.bin
1738f100502125aae680c62333de3790a9fa49bbe87540c8d95884d180a37f5d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x939E 23112 bytes
font_00_sfnt_off00005c96.bin
7a2f4cd16a08dfb5d1cc3059ab104f40f01d43a4d5b0588df0eb4ddbe6441593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C96 5032 bytes
font_01_sfnt_off00006d99.bin
413234129af09f0900ea928084b96c99e13e8823afebd264221082fc6cbdb9a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 12600 bytes
font_03_sfnt_off0000bc06.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC06 4324 bytes

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