Malicious PDF — malware analysis report

Static analysis result for SHA-256 830ccc9522ef910d…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 01:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2455dbf0ce5e47131fcd2c3b2c2cccd SHA-1: d7fb320a0550307dbdb191bc59e2cf366549520b SHA-256: 830ccc9522ef910df77a120746ef88438ffe61d4a45884ad5f10e3af8e32866c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The primary link, https://ttraff.cc/pify?keyword=absolute+path+information+is+required+c%2523, is designed to obscure the final destination and likely leads to further malicious content or phishing pages. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute 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.cc/pify?keyword=absolute+path+information+is+required+c%2523
    • http://furizi.mostkreativeklassroom.org/uploads/1/3/0/7/130738909/lurigufamaz-gukarosadiloroj-kuvidubafivu-vizitusadewu.pdf
    • http://files.dead-finder.com/uploads/1/3/0/8/130813141/b53d55292.pdf
    • http://fajebu.bac4training.com/uploads/1/3/0/9/130968996/3834a7bf135.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/jufirizutasikunuroxuxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/gifunadefitenabomim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/82045000682.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/59130389182.pdf
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/jojilijonodifejabemuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63032467643.pdf
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/12799652731.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/52671732107.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/6260480579.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/sample_html_files.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007749.bin
2a69853cee850cc87cbd0bc51e49b464ae41dc4815c815c7908b94b64660f966
pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 5652 bytes
font_01_sfnt_off00008a3d.bin
8ffbbf495b96c296c7ab3014b473b6b67f362e6b2196c9d9ecc9c483417c6c50
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 9896 bytes