Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55cf9ea46e69af0…

MALICIOUS

PDF

48.3 KB Created: 2020-08-25 19:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 169c5c01107ec68b1c579896bab16a9e SHA-1: c41ee1e823d58a606306ba7f8231071f6d1ccfb9 SHA-256: f55cf9ea46e69af050aa5647e986b772501b89e90a064fbdc913c7995a4e9c99
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Phantasy Star 4 skill and tech list', and the embedded URL points to this same topic. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of a link farm used for SEO poisoning or distributing malicious content.

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=phantasy+star+4+skill+and+tech+list
    • http://sesevuk.davidperlock.com/uploads/1/3/2/6/132681245/kixaluzazaboto_sofonidok.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6758/files/posafaguginajenesikug.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/33487378433.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nijudesiko.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/69459138077.pdf
    • https://cdn.shopify.com/s/files/1/0430/0711/5423/files/daginon.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/bloons_td_4_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/kexebodifuleg.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/66285695144.pdf
    • https://cdn.shopify.com/s/files/1/0459/8877/4045/files/87994065493.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/60542049632.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/noxopefuboropufuzuvevex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cee.bin
140c201e5b7422c6fd6b558e7a8eae38c7714a5b05398b2dedeff449e87f25d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEE 5080 bytes
font_01_sfnt_off00007eae.bin
50aef3a4532ef8ee8f71c14a9f2bb556f8843edccb4d23910dda440efba60cb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAE 5284 bytes
font_02_sfnt_off00009093.bin
f188c12f5b85afe53287e0550e8df95763ded8bf0db4fdc0187848646e1271ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 10296 bytes