Malicious PDF — malware analysis report

Static analysis result for SHA-256 2619ea2b9c09f50b…

MALICIOUS

PDF

70.8 KB Created: 2020-07-25 14:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2660fe19a1387beb4f877e240d54116e SHA-1: ce2dc46bbea9d3620b548527765511c6d19fec40 SHA-256: 2619ea2b9c09f50ba43f0ea99200acabf1d2c43ac64a23e4d5d0575e15147e4e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body appears to be garbled, but the presence of a link to 'ttraff.com' and a large number of external PDF links suggests a link-farming or redirection attack. No scripts were extracted from this sample.

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=fgo+halloween+2018+rerun+farming+guide
    • http://files.alisonpcampbell.com/uploads/1/3/0/7/130775304/weseso.pdf
    • http://files.uptimizm.net/uploads/1/3/0/9/130969057/2272485.pdf
    • http://files.tilliesschoolofperformingarts.com/uploads/1/3/0/7/130776490/2308790732d.pdf
    • http://files.drorangejuicer.com/uploads/1/3/1/8/131871907/zimibawekapes-furoluviri-zumewosuxotigin.pdf
    • http://files.coppermoonsculpture.com/uploads/1/3/1/1/131164198/xolorenupiko-xawatub.pdf
    • http://files.uptimizm.net/uploads/1/3/0/9/130969057/227248
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/tutosuxupike.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/56131415230.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/63000286698.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/kavufelanuji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/pizediwegepinisare.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/43109074721.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/73774540209.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/setapikukogebofigatetoku.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/27751836422.pdf
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/55763260455.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/7012203066.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.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_off00007b76.bin
f31a4c8898cad60716f97ab2845d4fe853ef748149e18964b8a7e01e8d501e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 22284 bytes
font_01_sfnt_off0000c1aa.bin
a1369f810f929c942d7a89a06853b7536a74f6aaf36248698881f7383de2f3d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AA 5512 bytes
font_02_sfnt_off0000d447.bin
0f409619485e2cf3c4a55595490d135b6ae8f6b026d2d976e6f50edf59fc4423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD447 10472 bytes
font_03_sfnt_off0000f81a.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 16092 bytes

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