Malicious PDF — malware analysis report

Static analysis result for SHA-256 067691fcec1e8704…

MALICIOUS

PDF

45.1 KB Created: 2020-08-12 23:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c370919a2d3b60b1b3d4aa0d39257e81 SHA-1: 57786995f48d08466a2fe68a15e8527bd785ee23 SHA-256: 067691fcec1e8704cfd8631097de38a311cb63cf0bfe21b6ee929a574a342130
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host numerous PDF files. One of the primary links directs to a known malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier also 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.ru/pify?keyword=project+planning+and+budgeting+pdf
    • http://fajob.felisarogers.com/uploads/1/3/2/3/132302780/fazexuwolositep.pdf
    • http://files.blbrunnemer.com/uploads/1/3/1/4/131408024/sosexuvirewizil-daxije-petudobibu.pdf
    • http://wakuw.mammas-amorepasta.com/uploads/1/3/2/8/132814930/ea340.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0944/0935/files/96625791836.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/77331849634.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/74710971999.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/fulugunotix.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/valores_normales_de_cetonas_en_orina.pdf
    • https://cdn.shopify.com/s/files/1/0439/9667/6254/files/tale_of_two_cats_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/bhu_bsc_entrance_exam_syllabus_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/giropokalexuferosokakol.pdf
    • https://cdn.shopify.com/s/files/1/0441/1329/7560/files/36801344369.pdf
    • https://cdn.shopify.com/s/files/1/0441/1303/5416/files/75440731496.pdf
    • https://cdn.shopify.com/s/files/1/0437/8581/4173/files/vopawenuxunuzijolowufow.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/rezuvidujofimenopuke.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/17834559483.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640e.bin
474d23d4017b2e6629d9c1ebed6f27be746a57fc9f2db794197a49c97fd0ef7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 5244 bytes
font_01_sfnt_off000075e9.bin
58697c07562505f25e9aa1e7c3ebecdf1d105664e1dae6edaca0b898143624ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E9 10296 bytes
font_02_sfnt_off00009904.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9904 4324 bytes

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