Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed32e10cabded41…

MALICIOUS

PDF

56.0 KB Created: 2020-08-06 20:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fce0dbf8a14681f225f93a8185c2cacc SHA-1: 7749e849dd34db0fffd21bfc7c9e4082b61bcfb3 SHA-256: 4ed32e10cabded41a0103264fb9bb7c1523b629b68df9a34333d964ac26f7a14
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine results or distribute malicious content. The primary redirector URL, https://ttraff.com/pify?keyword=shear+force+and+bending+moment+basics+pdf, is flagged as malicious. The document body itself is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, but the presence of numerous Shopify-hosted PDF links indicates a coordinated effort to host and link to content, likely for malicious purposes.

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=shear+force+and+bending+moment+basics+pdf
    • http://files.lavwcd.com/uploads/1/3/1/3/131398541/sibekigusew_pufefanapu_gulalelu.pdf
    • http://files.theaffairseries.com/uploads/1/3/1/4/131411281/pilaximuxipa-ladoziveludu.pdf
    • http://files.rainbowcoloredgrass.com/uploads/1/3/1/8/131871864/812966559.pdf
    • http://files.littlewingcollective.com/uploads/1/3/1/1/131163902/gudunetizokamejubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/rafawipalola.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/72556620795.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/wemipigataxetokuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/3642/5883/files/kigakenawawodewobam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/wamubuzuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8437/files/wipikefage.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xedatojif.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/lisbon_portugal_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/effortless_english_dvd_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/vujelakedini.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/davipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/rekivubajiwumimixuziritub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/qualitative_test_carbohydrates.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/important_synonyms.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_off00007166.bin
acba9ebea3c07678e6a4939277e3e22d1d3d256b2b6c09e067d8e339fb8f0141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7166 5568 bytes
font_01_sfnt_off00008418.bin
f37330c8d428010e56dd468697d34fe1664d6a000128bd25bb30103dd07c43c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 13912 bytes
font_02_sfnt_off0000afd0.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD0 16060 bytes
font_03_sfnt_off0000c463.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC463 4324 bytes

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