Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f228d31727f24be…

MALICIOUS

PDF

44.7 KB Created: 2020-08-24 11:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ea35c3aaee77e54da379d6843da6c46 SHA-1: 759d8ef37e8a463e501f43ba09979cf938fe5bca SHA-256: 2f228d31727f24bead0a335e5e0b261d302863b68d114afed2470e97b8577357
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a high number of embedded links, many of which point to potentially malicious redirectors. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=aluminum+sheet+pans+18+x+26', which is likely used to obscure the final destination. The document body contains garbled text, suggesting it is not intended for human consumption but rather to host these links.

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=aluminum+sheet+pans+18+x+26
    • http://lenuwavu.randvphotography.com/uploads/1/3/0/7/130776031/nivenarasigedurolut.pdf
    • http://fuwob.ohr.co.za/uploads/1/3/0/7/130776433/3549057.pdf
    • http://files.reslifechurchaz.com/uploads/1/3/1/3/131379343/wiloniweson.pdf
    • http://fivezo.localzak.com/uploads/1/3/2/7/132710621/2880724.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/new_york_state_cdl_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/wow_classic_syndicate_emblem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/paparuvogas.pdf
    • https://cdn.shopify.com/s/files/1/0440/8059/5094/files/tuxisadosaboribapimul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/tatudowevuwulabedozolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/50353582607.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/30492579637.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/29171092365.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/lancaster_canal_pike_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/64806606194.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/stock_and_watson_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/modded_wii_u.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_off00006c7c.bin
f0728b34cad1dc8fbf1786e51f6c0f57e67979c3febc701812dfffd21b21676a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7C 5552 bytes
font_01_sfnt_off00007f32.bin
fe7076faadfc5a86d0ddb073bef06f54a193b6187d49f2436d807c8e918103cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F32 11256 bytes