Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0ec045da3c278d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 21:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc8724e0491c39229b702f6f4e6c93be SHA-1: e35b7ede5dbd30665a466de90edabdff9073e815 SHA-256: 3a0ec045da3c278dfda2a749e8fa54155cf0b51f7a5a477652513ae053f2afd8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Ikea kitchen design guide' and the malicious URL 'https://ttraff.cc/pify?keyword=ikea+kitchen+design+guide', suggesting a lure to entice users to click on malicious links. The presence of a large number of external PDF links further indicates a link farm or redirection strategy. 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.cc/pify?keyword=ikea+kitchen+design+guide
    • http://febop.positivelyfloridatc.com/uploads/1/3/2/6/132695924/zobalod.pdf
    • http://files.prologuetech.com/uploads/1/3/0/7/130775870/vorikuwofadopopileka.pdf
    • http://files.soulhealthservices.com.au/uploads/1/3/1/8/131871621/a7b02a2c.pdf
    • http://files.companionsofchrist.org/uploads/1/3/0/9/130969375/3234800.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/51560599304.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/botekamij.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/64216005850.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8296/files/napokujila.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/87153873976.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/guwepirebapuwulalupab.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/1150702452.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/42206918131.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/roberto_cantoral_el_triste.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/tawiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/plant_systematics_gurcharan_singh_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8896/9882/files/53794314978.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ee.bin
cdfc43abd121beaa9a6b744fb3f5bd42b64444523c7e7fefa664edb8890ecf08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 5072 bytes
font_01_sfnt_off0000741d.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 1800 bytes
font_02_sfnt_off00007caa.bin
a5486051b735ccc26ef218208efed2ea7eb95bd49bf6d223a63a8541c12f1318		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAA 10268 bytes

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