Malicious PDF — malware analysis report

Static analysis result for SHA-256 574d5089be0fcdc1…

MALICIOUS

PDF

58.5 KB Created: 2020-08-12 07:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c71d794af28da68297f999a21df7d92d SHA-1: 6fe3e789d44dba49e761c8fa52e97cdebd1b7c9c SHA-256: 574d5089be0fcdc115fa765061178667fe7eb8ddf34f3d0394b3b2c27b3b2a17
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=ap+anganwadi+application+form+pdf'. The document body, though heavily obfuscated, appears to contain text related to an 'Ap anganwadi application form pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=ap+anganwadi+application+form+pdf
    • http://files.lhfministries.com/uploads/1/3/1/1/131164236/fifegu.pdf
    • http://files.sainthonorepastry.com/uploads/1/3/1/3/131383314/pamosavedupolewowa.pdf
    • http://files.huesoproductions.com/uploads/1/3/1/4/131406684/bapekusupoxi.pdf
    • http://litepapu.thesovereigntymovement.com/uploads/1/3/1/4/131407005/suwepifitusuv-watimuw-tagemizos.pdf
    • http://files.udderangels.net/uploads/1/3/1/1/131163854/1938998.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8732/files/best_part_of_me_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/woxoxibapumalowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/vawazemazodopubile.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/18209484512.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/pm_awas_yojana_2020_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/25411973236.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/caring_for_your_baby_and_young_child_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavijado.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/23509292157.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/19939745241.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/10608882452.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_off00007434.bin
999be779934c957e8f77cdafb708342ff79a17d3cca679df5c30bfb6ff3d102a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7434 5380 bytes
font_01_sfnt_off00008674.bin
66cf1899785bfef0764fe8237b091330048dc2407024698cee4286fe0a866611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8674 21640 bytes
font_02_sfnt_off0000b788.bin
0611ee24be67001562f9ba87571688b4f9ef36e8caece2085053263ea39d3d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB788 10844 bytes

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