Malicious PDF — malware analysis report

Static analysis result for SHA-256 1199d2d79de72590…

MALICIOUS

PDF

50.9 KB Created: 2020-07-10 21:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f3c2113b1cf8c7a11a40ccf1a89de8b SHA-1: c8a8c375336e56e3314968747eb7a7fd8501ef17 SHA-256: 1199d2d79de7259016440b3d5fa0f65ef17b6e6294e7f741708b5e0f5ae72f0b
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, many of which point to redirector infrastructure, indicating a link farm or phishing campaign. The document body, though obfuscated, contains text related to deleting PDF pages and a URL that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=delete%20pdf%20pages%20without%20acrobat%20pro
    • http://files.beaconforlife.com/uploads/1/3/1/4/131454634/fobupusomuxem_fupukile_diwix.pdf
    • http://files.corpseapple.com/uploads/1/3/0/7/130776781/dobabukanewuxe.pdf
    • http://files.almutalbrecht.com/uploads/1/3/0/7/130739769/fde2986e0a268.pdf
    • http://files.sophiesparks.com/uploads/1/3/0/7/130738596/zonivewakuzu_gawaxevofe_gofodab.pdf
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdf
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdf
    • http://files.teesdalechallengewalks.net/uploads/1/3/0/7/130739740/vebikegebirezul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://kumuderaxumi.files.wordpress.com/2020/07/41658283478.pdf
    • https://tupasol224450395.files.wordpress.com/2020/07/23273910092.pdf
    • https://wivotomamal.files.wordpress.com/2020/07/golakivedopubalodobete.pdf
    • https://serejepoduw.files.wordpress.com/2020/07/69780340320.pdf
    • https://bifariki.files.wordpress.com/2020/06/66825862174.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/gigidofejofinitukanabel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/12743677898.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/moxudenolaruxorurafugi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/jeregiluxip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/66612713019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.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_off0000883b.bin
ba5fbba935ab646a9b4a92c99090984eedab96a1dae64873a168f721a77a2eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 5424 bytes
font_01_sfnt_off00009ad4.bin
280bbc7a13d5203a1525f728ea3dc729c6246e93383255d4b0a4f2e8d3b71c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD4 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.