Malicious PDF — malware analysis report

Static analysis result for SHA-256 6476fd7b2030f437…

MALICIOUS

PDF

46.2 KB Created: 2020-08-08 23:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38b0328275a057b45ab977126f2c4275 SHA-1: b96f438957a39c8764f451f0f59082775114fb4e SHA-256: 6476fd7b2030f437cd534d8e4b76fe3a18106e3cb280fd60c22f57ce0ad3e38e
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 document body, though heavily obfuscated, contains text related to 'pdf to word converter' and a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests a phishing or scam attempt to redirect users to malicious infrastructure.

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=pdf+to+word+converter+nitro+pro+9
    • http://pirur.marthomawashington.com/uploads/1/3/1/4/131437792/9214208.pdf
    • http://files.youthfastpitch.org/uploads/1/3/2/8/132814930/019d4cb.pdf
    • http://vabewalo.septictankpumpinggwinett.com/uploads/1/3/1/3/131398560/7410293.pdf
    • http://lavalosu.kmagalski.com/uploads/1/3/0/8/130874431/4722298.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/nuzikakusogijafisonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/73862891180.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/66479309705.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/periodic_table_scavenger_hunt_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/lopibujazalutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/fakigisil.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/ielts_writing_task_1_sample_answer_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/gofunevasirib.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/fuvarogalukalujibifosew.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/29212923801.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/geloxusawijelize.pdf
    • https://cdn.shopify.com/s/files/1/0435/4280/6680/files/wepijigorakenenufan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/rofarufolujesogaxedozofud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/rokakidawikifefug.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_off00006b36.bin
d82e997caded00ad659b8479b2b84376bd28d47c29978d36d3aabfb983e38b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B36 4828 bytes
font_01_sfnt_off00007bc1.bin
2adc454ecc62c4b9684b53b7f7fe5649b46800b542d1f5c39f9e8887b38dfa8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC1 9932 bytes
font_02_sfnt_off00009dc8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC8 4324 bytes

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