Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebc43ea495d6598…

MALICIOUS

PDF

47.3 KB Created: 2020-08-05 03:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 212ab0ba785872d5b47bf3167f763601 SHA-1: c2f4c6125a270e31fa3cbe9d09a9980991584685 SHA-256: 2ebc43ea495d65982a9b80e1390769a690b9b989b64af7e158a54bbadfc45a69
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify but appear to be part of a link farm. One prominent link, 'https://ttraff.cc/pify?keyword=ap+sachivalayam+digital+assistant+syllabus+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious content via a deceptive lure.

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=ap+sachivalayam+digital+assistant+syllabus+pdf
    • http://files.stuarts2gabon.com/uploads/1/3/0/9/130969862/tewosuxum-vilotupaparo-wukejujojamudu.pdf
    • http://files.funtastic101.co.uk/uploads/1/3/0/9/130969004/guwubibadoger.pdf
    • http://files.janestraveladventures.com/uploads/1/3/0/7/130740586/mabisaruvotu.pdf
    • http://files.entrecontinentes.com/uploads/1/3/0/9/130969045/zunutusitusubesejof.pdf
    • http://files.lindsayblooms.com/uploads/1/3/1/1/131164573/gaxumiwos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/niwijogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/29694230159.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96056065099.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/duretugib.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/puzizesukubesapuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/befekunimejedixam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/fegojorepebadedagopuxow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/zokufobunisuxowewev.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/chrome_flash_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/fewelifegujumejatuvezeku.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_off00007a2a.bin
5d33eedccff1590a646edf6cc89c6d380762e2a8524825439eeeadafc9665651
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2A 5764 bytes
font_01_sfnt_off00008dbe.bin
7cc5fea55d6ab688c70caa8a15bbce8a4b3ce875ada3ef6fdacb47b009804716
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBE 10180 bytes