Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da087600b2e61b0…

MALICIOUS

PDF

68.6 KB Created: 2020-08-04 19:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b5b46abe08b6901ce6d30196a6984e SHA-1: 90082c9b86b66c79122b59855449c19f07fe9467 SHA-256: 1da087600b2e61b0e4add46b85bf35ee0a75c9f7124d0a9f6424d618d3312a7b
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a tutorial, but the primary link redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to a known malicious domain. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document's structure and embedded links indicate a social engineering attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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=web+page+development+tutorial+pdf
    • http://files.martinchilando.com/uploads/1/3/1/4/131407233/2160080.pdf
    • http://files.eamprofessionals.com/uploads/1/3/0/7/130776661/5091698.pdf
    • http://files.kvegasnuts.com/uploads/1/3/0/8/130815213/5769549.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/14611104320.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/64018146181.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/sinc_interpolation_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/jakiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/mustard_seed_garden_manual_of_painting.pdf
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/45291242080.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/lilulek.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/33844441851.pdf
    • https://cdn.shopify.com/s/files/1/0437/3849/7185/files/70621415019.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/kelolupexebozipolus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/sust_admission_circular_2020_18_download.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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007de0.bin
792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE0 6568 bytes
font_01_sfnt_off00008e2d.bin
cdb2b0bb3e5f12a4d7c8012d89e4438acc9bc39ea613e4323ff73fb1092f33ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2D 5276 bytes
font_02_sfnt_off0000a008.bin
f52ee187d08e463209b5a774824e3da0418be9ef856d8a4dbe46033fd3cc210d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA008 4420 bytes
font_03_sfnt_off0000b116.bin
efca468f2c5a79bc1aaa5f04e8b826f00d0fa717418ce93450d9d57fc45ccaa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB116 10816 bytes
font_04_sfnt_off0000d63d.bin
a0f76124aa4ccb19270018fe8a4ad50640c0eca5a055b0389f6d8ca953e4fb68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD63D 16484 bytes
font_05_sfnt_off0000ec7c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 4324 bytes
font_06_sfnt_off0000fa2f.bin
0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 1736 bytes

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