Malicious PDF — malware analysis report

Static analysis result for SHA-256 e008955551a6a81f…

MALICIOUS

PDF

44.3 KB Created: 2020-08-10 22:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86e4a671729340bdc6990775d7a58c8 SHA-1: 2a42452f743cae772df0a4de0c1fb91f9ed72bbd SHA-256: e008955551a6a81fd75f6ac50603a6ec3f6b2b7df84af4cf029f82ddebd889b9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=chloroplast+structure+and+function+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. 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=chloroplast+structure+and+function+pdf
    • http://files.txstateacctclub.com/uploads/1/3/1/8/131856276/3c7ab.pdf
    • http://files.thetalksoflife.com/uploads/1/3/1/3/131398091/c59adb38b89fc.pdf
    • http://files.recycledcabinetsolutions.com/uploads/1/3/0/7/130776077/luguzulelotof-jezoxedozikag.pdf
    • http://files.autismcenterkenya.org/uploads/1/3/1/8/131857690/xukuj_kevapedas_xajejeretoninu_lijidamesir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/fipep.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/25568709530.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/12518048951.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/bezejizigijijij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/71667800872.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/49400902026.pdf
    • https://cdn.shopify.com/s/files/1/0447/6711/7463/files/spring_boot_tutorial_francais.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/simafamumorikot.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/66932502782.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/chainsaw_collectors_corner.pdf
    • https://cdn.shopify.com/s/files/1/0448/1895/6449/files/74728803367.pdf
    • https://cdn.shopify.com/s/files/1/0450/4230/3140/files/inorganic_chemistry_atkins_6th_edition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000704b.bin
c476bd2bb821e1cce595da5e686a2b00a423512f44f346a3997b4e2f78b744f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704B 5148 bytes
font_01_sfnt_off000081bf.bin
57a8f3734f950c351446f267adb614fa795dd77a68a4e19542cd3ca46bb08796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81BF 10120 bytes

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