Malicious PDF — malware analysis report

Static analysis result for SHA-256 58798ef75653eeee…

MALICIOUS

PDF

62.5 KB Created: 2020-08-22 18:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3623290beb0aea15ae597114dfc73c4b SHA-1: dcf6009d6d51bc0811ec83bc1872ff32cbd54fa0 SHA-256: 58798ef75653eeeea02f5e4dab1e5edfa534dde0bbae160f83b19fcf3cff8c9b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a known malicious domain, ttraff.com, disguised as a search query for "Types of economic systems chart answers". This indicates a phishing or social engineering attack. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier 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.com/pify?keyword=types+of+economic+systems+chart+answers
    • http://files.schaefernursery.com/uploads/1/3/0/7/130775729/173f9ee88ae97a2.pdf
    • http://files.nurseryschoolofumc.com/uploads/1/3/0/8/130814935/woxuje.pdf
    • http://files.meest.ca/uploads/1/3/1/8/131857758/fekome.pdf
    • https://cdn.shopify.com/s/files/1/0438/2015/5037/files/7844860820.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/kupabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/galasejipote.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/ccna_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/no_steam_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/sisusenalov.pdf
    • https://cdn.shopify.com/s/files/1/0428/7057/1174/files/40359597814.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/9479024763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21154843933.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/79456002708.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_off0000b4f0.bin
7aaba5b86ae489c1acf204e03caacbd1e96b58e88cbfa672d911b577181a670d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F0 5368 bytes
font_01_sfnt_off0000c720.bin
ae66526cc8d9bc992b18ad0b99391f0b7676e4a3aff85b1330baa7167d08c57a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC720 11484 bytes