Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fec6e838e68ce6e…

MALICIOUS

PDF

43.3 KB Created: 2020-08-24 03:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33504b0321b2e8e7840f7cfea20963e2 SHA-1: cedbf7a485934385eb8a4bf38c79743f79c20262 SHA-256: 1fec6e838e68ce6e5fc11b5f34e4afc2c2eea1d2e784614c90d2deb84fcddb0d
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com' which is flagged as a malicious redirector. The document body, though partially corrupted, includes the same URL and a lure related to a 'wifi speed booster apk pro'. This suggests the primary goal is to trick the user into visiting the malicious URL, likely to download further malware. The PDF also hosts a large number of links to other PDFs, potentially for SEO manipulation or to spread malicious content across multiple domains.

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=wifi+speed+booster+apk+pro
    • http://xovizo.johannayaun.com/uploads/1/3/1/1/131163601/tuvaraxugos.pdf
    • http://files.wsr-tlc.com/uploads/1/3/1/3/131384589/6779782.pdf
    • http://files.westlinnalcohol.com/uploads/1/3/0/7/130776655/2787444.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2994/files/anglo_saxon_literature_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/marketing_e_arquetipos_helio_couto.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/vixekozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/gegitigojajaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4395/3563/files/27114118227.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/computer_systems_organization_and_architecture_carpinelli.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/posinufugejuxufare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/favozizananoxobef.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/halgi_bajau_kya_full_song.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/fibonacci_sequence_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/airtel_tv_channel_number.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac1.bin
ddbbbbd80286253b113ef9f61a539724437a5fc1c0ac262d9f21f1ad834f376d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC1 4900 bytes
font_01_sfnt_off00005b83.bin
ea0b6482120d02a49a3d56a3c3570455e97fe3ba2dcccaf5101f9c0f798902e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B83 9776 bytes
font_02_sfnt_off00007d3d.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3D 16060 bytes
font_03_sfnt_off000091d3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D3 4324 bytes

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